Relevant bibliographies by topics / Sulfuric material

Academic literature on the topic 'Sulfuric material'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Sulfuric material.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Sulfuric material"

1

Hyk, Wojciech, Konrad Kitka, and Dariusz Rudnicki. "Selective Recovery of Zinc from Metallurgical Waste Materials from Processing Zinc and Lead Ores." Molecules 24, no. 12 (June 19, 2019): 2275. http://dx.doi.org/10.3390/molecules24122275.

Full text
Abstract:
A method for processing of metallurgical waste materials (chemically defined as sulfur-bearing zinc-ferric materials) produced by plants processing zinc ores and their concentrates is proposed. The method proposed is a combination of pyro- and hydrometallurgical treatments of the waste material. The crucial steps in the developed method include: roasting the material at 450 °C to generate sulfur dioxide (SO2), absorption of SO2 in an aqueous system to form sulfuric acid (IV), carbothermic decomposition of zinc ferrite compounds, and leaching of zinc from the roasted material using sulfuric (IV) acid. The method allows one to extract up to 40% of zinc from the waste material and, consequently, to generate a fraction of material with substantially higher content of iron oxides. The proposed method takes advantage of the presence of sulfur in the processed material which upon roasting is converted to sulfuric acid (IV)—a leaching agent for selective extraction of zinc. The properly adjusted pH of the aqueous medium in which the leaching process is carried out is the key factor determining the quantitative and selective separation of zinc. If the amount of sulfur in the processed material is insufficient, it may be supplemented by adding sulfuric acid (VI) to adjust the pH. The method proposed was tested at a laboratory scale and quarter industrial scale using the real samples taken from stockpiles in the vicinity of the plant processing zinc and lead ores in Poland. It may also work for any zinc-ferric materials from various sources.
APA, Harvard, Vancouver, ISO, and other styles
2

Amirabad, Morteza Mirzaei, Alireza Mirzaei Amirabad, Jafar Khodagholizadeh, and Ali Akbar Naeimi. "Producing Hydrogen through Electrolysis." Applied Mechanics and Materials 110-116 (October 2011): 2296–300. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2296.

Full text
Abstract:
In this paper, we discus about production Hydrogen for industrial and laboratories. We will discuss about methods of production Hydrogen and exquisite in electrolysis Power Acids. In this paper, compare some methods and materials. We prefer Sulfuric Acid. For electrolysis Sulfuric Acid, we need electrode. The material of electrode must refractory in corrosion by Sulfuric Acid. This material is alloy from palatine and other material. The physical face of electrode is too important and discus in this paper.
APA, Harvard, Vancouver, ISO, and other styles
3

Ivan, Eliansion, and Hindriyanto Dwi Purnomo. "FORECASTING PRICES OF FERTILIZER RAW MATERIALS USING LONG SHORT TERM MEMORY." Jurnal Teknik Informatika (Jutif) 3, no. 6 (December 26, 2022): 1663–73. http://dx.doi.org/10.20884/1.jutif.2022.3.6.433.

Full text
Abstract:
This study uses long short term memory (LSTM) modeling to predict time series data on the price of fertilizer raw materials, namely prilled urea, granular urea, ammonium sulphate((NH4)2SO4), ammonia (NH3), diammonium phosphate((NH4)2HPO4 ), phosphoric acid (H3PO4), phosphate rock (P2O5), NPK 16-16-16, potash, sulfur, and sulfuric acid (H2SO4). Predictions are made based on data that existed in the past using the long short term memory method, which is a derivative of the recurrent neural network. Carry out the evaluation process by looking at the root mean square error (RMSE) and mean absolute percentage error (MAPE) of the model that has been created. The results obtained are quite good, as seen from the root mean square error (RMSE) and mean absolute percentage error (MAPE) which are close to 0 and not too high. Sulfur raw material got the smallest root mean square error (RMSE) with a score of 0.053 and diammonium phosphate raw material got the smallest mean absolute percentage error (MAPE) evaluation value with 2.3%, while the largest value was for the root mean square error (RMSE) of raw materials. Phosphoric acid fertilizer raw material with a value of 22,979 and the largest mean absolute percentage error (MAPE) comes from sulfuric acid fertilizer raw material with a value of 9.180%.
APA, Harvard, Vancouver, ISO, and other styles
4

Qiu, Chuan, Xian Zheng Gong, Wen Juan Chen, Zhi Hong Wang, Feng Gao, and Xiao Qing Li. "Materials Flows Analysis on the Beneficiation and Roasting Processes of a Typical Rare Earth Mineral." Materials Science Forum 847 (March 2016): 352–57. http://dx.doi.org/10.4028/www.scientific.net/msf.847.352.

Full text
Abstract:
The aim of this paper is to explore material flow analysis, study the resource consumption and environmental impact of the production preparation process of typical rare earth materials. The results showed that in the beneficiation processes, producing one ton of rare earth concentrates (Rare Earth Oxide, REO50%) will also produces 27 tons of iron ore and 21 tons of tailings. The recovery of rare earths is only 16.8%. In roasting processes, roasting one ton (REO50%) of rare earth concentrates will emits 150 ~ 200Kg sulfuric acid mist, 500 ~ 600Kg sulfur dioxide, 30 ~ 40Kg fluoride, 30 ~ 50Kg smoke and1t (containing thorium) radioactive slag, and 1.2 tons of concentrated sulfuric acid should be used. The lower recoveries and large-scale of concentrated sulfuric acid used in roasting processes in rare earth industry are the main reasons lead to high pollution and high emissions.
APA, Harvard, Vancouver, ISO, and other styles
5

Reynosa-Martínez, Ana Cecilia, Erika Gómez-Chayres, Rafael Villaurrutia, and Eddie López-Honorato. "Controlled Reduction of Graphene Oxide Using Sulfuric Acid." Materials 14, no. 1 (December 25, 2020): 59. http://dx.doi.org/10.3390/ma14010059.

Full text
Abstract:
Sulfuric acid under different concentrations and with the addition of SO3 (fuming sulfuric acid) was studied as a reducing agent for the production of reduced graphene oxide (RGO). Three concentrations of sulfuric acid (1.5, 5, and 12 M), as well as 12 M with 30% SO3, were used. The reduction of graphene oxide increased with H2SO4 concentration as observed by Fourier-transformed infrared spectroscopy and X-ray photoelectron spectroscopy. It was observed that GO lost primarily epoxide functional groups from 40.4 to 9.7% and obtaining 69.8% carbon when using 12 M H2SO4, without leaving sulfur doping. Additionally, the appearance of hexagonal domain structures observed in transmission electron microscopy and analyzed by selected area electron diffraction patterns confirmed the improvement in graphitization. Although the addition of SO3 in H2SO4 improved the GO reduction with 74% carbon, as measured by XPS, the use of SO3 introduced sulfur doping of 1.3%. RGO produced with sulfuric acid was compared with a sample obtained via ultraviolet (UV) irradiation, a very common reduction route, by observing that the RGO produced with sulfuric acid had a higher C/O ratio than the material reduced by UV irradiation. This work showed that sulfuric acid can be used as a single-step reducing agent for RGO without sulfur contamination.
APA, Harvard, Vancouver, ISO, and other styles
6

Trushkova, Ekaterina, Elena Omelchenko, and Mikhail Sidelnikov. "Improvement of environmental indicators of coal energy and agricultural production due to the integration and diversification of these industries." E3S Web of Conferences 217 (2020): 04008. http://dx.doi.org/10.1051/e3sconf/202021704008.

Full text
Abstract:
At present, there is extensive experience in the use of sulfuric acid ameliorant for soils with soda type of salinity. The authors found that as a result of using a weak solution of sulfuric acid on soils containing sodium and hydrocarbonates in their salt composition, their agrochemical characteristics are significantly improved. The article presents the results that show that the production of fertilizers and ameliorants from the waste of energy enterprises will increase their environmental safety. The use of sulfur oxides captured from the flue gases of coal-fired energy enterprises as a raw material for the production of sulfuric ameliorant will allow solving a double task: to reduce pollution of the zone of influence of enterprises and improve the condition of lands with soda salinization.
APA, Harvard, Vancouver, ISO, and other styles
7

Li, Yong Li, Li Ping Mao, Cai Feng Xu, and Shi You Li. "A Preliminary Study of the Carbon-Based Solid Acid Preparation Process." Advanced Materials Research 734-737 (August 2013): 2236–39. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.2236.

Full text
Abstract:
Cotton and sulfuric acid that concentration is 98% as the raw material, to compare the resulting solid carbon sulfonic acid content of the material under different reaction temperatures. FTIR analysis shows that the cotton carbon is an amorphous carbon after sulfonation reactions, a sulfonic acid group present in the resulting material. When the sulfonation temperature is 170 °C, the prepared cotton carbon sulfonic acid has the highest acid content. By the sulfuric acid TG/DTG curve analysis, it verify: 170 °C is the highest activity temperature point of sulfuric acid sulfonation reaction.
APA, Harvard, Vancouver, ISO, and other styles
8

Sultana, Sujala T., and M. Ruhul Amin. "Aspen-Hysys Simulation Of Sulfuric Acid Plant." Journal of Chemical Engineering 26 (March 24, 2012): 47–49. http://dx.doi.org/10.3329/jce.v26i1.10182.

Full text
Abstract:
This work presents a theoretical investigation of the simulation of Sulfuric acid process plant. In the production of the acid in contact process liquid sulfur is sequentially oxidized to Sulfur tri oxide via an exothermic reaction which is absorbed by 98% Sulfuric acid in an absorption tower. In this research Aspen One V7.2 has been successfully used to design every sub-process of the sulfuric acid plant in one integrated environment. In order to simulate the process as accurately as possible COM thermo was selected as advanced thermodynamics. Electrolyte NRTL and Peng-Robinson were used for liquid and vapor phase respectively as fluid package and HYSYS properties were used for simulation. The simulation of sulfuric acid process included automatic chemistry generation and the capacity of handling electrolyte reactions for all unit models. Aspen-HYSYS provides specialized thermodynamics models and built-in data to represent the non-ideal behavior of liquid phase components in order to get accurate results. Material and energy flows, sized unit operations blocks can be used to conduct economic assessment of each process and optimize each of them for profit maximization. The simulation model developed can also be used as a guide for understanding the process and the economics, and also a starting point for more sophisticated models for plant designing and process equipment specifying. DOI: http://dx.doi.org/10.3329/jce.v26i1.10182 JCE 2011; 26(1): 47-49
APA, Harvard, Vancouver, ISO, and other styles
9

Álvarez, María Luisa, José Manuel Fidalgo, Gabriel Gascó, and Ana Méndez. "Hydrometallurgical Recovery of Cu and Zn from a Complex Sulfide Mineral by Fe3+/H2SO4 Leaching in the Presence of Carbon-Based Materials." Metals 11, no. 2 (February 6, 2021): 286. http://dx.doi.org/10.3390/met11020286.

Full text
Abstract:
Chalcopyrite, the main ore of copper, is refractory in sulfuric media with slow dissolution. The most commonly employed hydrometallurgical process for the oxidation of chalcopyrite and copper extraction is the sulfuric acid ferric sulfate system The main objective of the present work is to study the use of cheap carbon-based materials in the leaching of copper and zinc from a sulfide complex mineral from Iberian Pyrite Belt (IPB). The addition effect of commercial charcoal (VC) and two magnetic biochars (BM and HM) that were obtained by pyrolysis of biomass wastes was compared to that of commercial activated carbon (AC). The experimental results performed in this work have shown that the presence of carbon-based materials significantly influences the kinetics of chalcopyrite leaching in the sulfuric acid ferric sulfate media at 90 °C. The amount of copper and zinc extracted from IPB without the addition of carbon-based material was 63 and 72%, respectively. The highest amount of extracted zinc (>90%) was obtained with the addition of VC and AC in IPB/carbon-based material ratio of 1/0.25 w/w. Moreover, it is possible to recover more than 80% of copper with the addition of VC in a ratio 1/0.25 w/w. Moreover, an optimization of the properties of the carbon-based material for its potential application as catalyst in the leaching of metals from sulfide is necessary.
APA, Harvard, Vancouver, ISO, and other styles
10

Nisah, Khairun. "EKSTRAKSI ALUMINA OKSIDA ( Al2O3) DARI TANAH LIAT DENGAN VARIABEL SUHU DAN KONSENTRASI ASAM SULFAT." Lantanida Journal 4, no. 1 (September 15, 2017): 1. http://dx.doi.org/10.22373/lj.v4i1.1833.

Full text
Abstract:
In this study used clay as raw material for making aluminum oxide using sulfuric acid as pelarut.Penelitian also aims to obtain sulfuric acid concentration and reaction time is best, where the variable used is the concentration of sulfuric acid ( 60 % , 70 % and 80 % ) and reaction time ( 40 minutes , 50 minutes and 60 minutes). The results showed that the greater the concentration of sulfuric acid , the levels of aluminum oxide obtained will be greater and greater the heating period , the levels of aluminum oxide obtained will also be greater . Optimum results obtained in 80% sulfuric acid concentration and reaction time 60 minutes.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Sulfuric material"

1

OLIVEIRA, THAIS de. "Recuperacao e reciclagem dos acidos nitrico e sulfurico e do molibdenio dos residuos liquidos das industrias de lampadas." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9554.

Full text
Abstract:
Made available in DSpace on 2014-10-09T12:27:58Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:00:54Z (GMT). No. of bitstreams: 0
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
APA, Harvard, Vancouver, ISO, and other styles
2

Peck, Michael S. "Materials study supporting thermochemical hydrogen cycle sulfuric acid decomposer design." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4860.

Full text
Abstract:
Thesis (Ph. D.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed Feb. 27, 2008). Vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
3

Ling, Yuanbing 1970. "Direct preparation of alpha-calcium sulfate hemihydrate from sulfuric acid." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84283.

Full text
Abstract:
In this work, the crystallization of alpha-calcium sulfate hemihydrate in sulfuric acid solution and the correlation between its properties and preparation conditions by reaction of sulfuric acid with lime (CaO) have been thoroughly investigated. The research involved the study of conversion-dissolution of calcium sulfate dihydrate in H2SO4 solution, the measurement of solubilities, thermo-dynamic calculations and the preparation of alpha-CaSO4 ·0.5 H2O via different methods of reactive mixing of H2SO4 and CaO. It was found that the calcium sulfate solids can saturate the sulfuric acid solutions in only 5 minutes. The solubility of calcium sulfate hemihydrate in 0--3.0M H 2SO4 solution at 100°C was experimentally determined and thermodynamic calculations with the aid of FactSage and OLI have led to establishment of the phase diagram for the CaSO4-H2SO 4-H2O system. An operating window has been determined in terms of H2SO4 concentration, temperature and time within which alpha-hemihydrate can be produced by reaction of lime with H 2SO4. This window is defined as 0.6--1.1M H2SO 4 (steady-state concentrations), 98--105°C and 1 hour retention time. Dihydrate was found to form as intermediate phase quickly converting to hemihydrate. The kinetics of conversion depends on the acidity level.
For the standard preparation procedure of adding lime into hot sulfuric acid, alpha-hemihydrate grows in the c-axis direction much more rapidly than in other directions ending in the form of fine needle crystals. Also, independent of the shape of the seed particles, the resultant crystals of hemihydrate are needle-shaped, which suggests a "dissolution-recrystallization" mechanism. Upon prolonged equilibration in their acid-preparation solution hemihydrate needle-shape crystals become fibrous and eventually convert to anhydrite. It is believed that uptake of SO42- instead of Ca2+ is the rate-determining step in the hemihydrate crystallization process. The hot SO42--rich environment rendered most of the additives (particularly organic) tried ineffective. Trivalent cations such as Fe3+ and Al3+, are the only ones found to modify the crystal morphology from needle-shape to small "grain" type morphology.
Slow addition of H2SO4 solution to slaked lime - reverse procedure was found to favor the production of alpha-hemihydrate with column-shaped as opposed to needle-shaped crystal morphology within otherwise the same operating window, 0.6--1.1M H2SO4. Preliminary assessment of the properties of the alpha-hemihydrate materials synthesized in this work showed them to compare satisfactorily with other materials produced by conversion of dihydrate to hemihydrate.
APA, Harvard, Vancouver, ISO, and other styles
4

King, Matthew Joseph. "Control and optimization of metallurgical sulfuric acid plants." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284812.

Full text
Abstract:
The pyrometallurgical processing of copper concentrates produces SO₂-bearing offgas. SO₂ in the offgas is catalytically oxidized to SO₃ and absorbed into a ∼98.5% H₂SO₄-H₂O mixture in a sulfuric acid plant. This research provides an analysis of a copper smelter sulfuric acid plant and discusses the control and optimization necessary to attain the following goals: (a) minimize smelter SO₂ emissions; (b) maximize acid plant capacity and availability. The objectives of this work are to: (a) prepare mathematical descriptions of sulfuric acid plant operations; compare the mathematical predictions with plant data; (c) use the mathematical descriptions to: (i) predict acid plant behavior with varying feed SO₂ strengths and gas flow rates; (ii) determine control strategies to minimize smelter SO₂ emissions; (iii) evaluate requirements for an existing acid plant to accommodate future increased feed gas flows and SO₂ strengths.
APA, Harvard, Vancouver, ISO, and other styles
5

Rigual, David Andrés. "Metallurgical characterization of self catalytic structural materials for sulfuric acid decomposition." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34654.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2005.
Includes bibliographical references (p. 276-279).
Eight heats of material with base alloy chemistries of Alloys 800 HT or 617 with platinum additions of 2, 5, 15, or 30 wt% have been characterized according to their microstructural features. The goals of characterization were to determine metallurgical stability for service as self-catalytic structural materials. The results presented herein will be useful to the development of a material for the construction of a heat exchanger designed for sulfuric acid decomposition. This type of heat exchanger is a key component to hydrogen generation by the thermochemical sulfur-iodine water-splitting process, a future technology that promises efficient hydrogen production if coupled to a Generation IV nuclear reactor heat source. Characterization of each material was carried out in the cast and wrought conditions with optical and SE microscopy, electron dispersive spectrometry, chemical composition analysis, and thermodynamic modeling. Materials have been characterized according to grain size and morphology, precipitate features, twinning characteristics, and platinum composition effects. Results indicate that platinum and carbon compositions have the greatest effect on the development of microstructural features.
(cont.) Increasing platinum compositions in both base alloy chemistries fosters the presence of annealing twins, which indicates that platinum additions reduce stacking fault energy within the alloy systems. Platinum additions appear to cause the development of larger grain structures as well as increase corrosion resistance. With the exception of the Alloy 800 HT - 30 wt% Pt system, the alloy systems characterized herein were melted with carbon contents between 1.2 - 3.6 times higher than the maximum specified compositions for the base chemistries. Excessive inter and intra-granular carbide precipitation resulted, which leads to compromised corrosion resistance and mechanical properties. Inter-granular attack due to sensitization is observed in the Alloy 800 HT - 2, 5 wt% Pt systems. SEM micrographs of the Alloy 617 - Pt systems show that these systems are less prone to inter-granular attack. The grain structures of each base alloy - Pt system are much finer than those of the respective base alloy systems included for comparison. Fine grain structures are detrimental to overall ductility and high temperature creep strength. On average, the Alloy 800 HT - Pt systems developed larger grains than the Alloy 617 - Pt systems.
(cont.) A two phase microstructure that resembles pearlite developed in the Alloy 617 - 30 wt% Pt system. This alloy system will be excluded from further characterization for self catalytic structural application due to expected poor mechanical and corrosion resistance properties. The most important microstructural improvements for the development of a self-catalytic structural material include a reduction of carbon content and an increase in grain size. Further characterization of catalytic, corrosion resistance, and mechanical properties are required for selection of the optimum platinum addition to the base chemistries of Alloys 800 HT and 617 for sulfuric acid decomposition service.
by David Andrés Rigual.
S.M.
APA, Harvard, Vancouver, ISO, and other styles
6

Hao, Yong. "Sulfur Based Electrode Materials For Secondary Batteries." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2582.

Full text
Abstract:
Developing next generation secondary batteries has attracted much attention in recent years due to the increasing demand of high energy and high power density energy storage for portable electronics, electric vehicles and renewable sources of energy. This dissertation investigates sulfur based advanced electrode materials in Lithium/Sodium batteries. The electrochemical performances of the electrode materials have been enhanced due to their unique nano structures as well as the formation of novel composites. First, a nitrogen-doped graphene nanosheets/sulfur (NGNSs/S) composite was synthesized via a facile chemical reaction deposition. In this composite, NGNSs were employed as a conductive host to entrap S/polysulfides in the cathode part. The NGNSs/S composite delivered an initial discharge capacity of 856.7 mAh g-1 and a reversible capacity of 319.3 mAh g-1 at 0.1C with good recoverable rate capability. Second, NGNS/S nanocomposites, synthesized using chemical reaction-deposition method and low temperature heat treatment, were further studied as active cathode materials for room temperature Na-S batteries. Both high loading composite with 86% gamma-S8 and low loading composite with 25% gamma-S8 have been electrochemically evaluated and compared with both NGNS and S control electrodes. It was found that low loading NGNS/S composite exhibited better electrochemical performance with specific capacity of 110 and 48 mAh g-1 at 0.1C at the 1st and 300th cycle, respectively. The Coulombic efficiency of 100% was obtained at the 300th cycle. Third, high purity rock-salt (RS), zinc-blende (ZB) and wurtzite (WZ) MnS nanocrystals with different morphologies were successfully synthesized via a facile solvothermal method. RS-, ZB- and WZ-MnS electrodes showed the capacities of 232.5 mAh g-1, 287.9 mAh g-1 and 79.8 mAh g-1 at the 600th cycle, respectively. ZB-MnS displayed the best performance in terms of specific capacity and cyclability. Interestingly, MnS electrodes exhibited an unusual phenomenon of capacity increase upon cycling which was ascribed to the decreased cell resistance and enhanced interfacial charge storage. In summary, this dissertation provides investigation of sulfur based electrode materials with sulfur/N-doped graphene composites and MnS nanocrystals. Their electrochemical performances have been evaluated and discussed. The understanding of their reaction mechanisms and electrochemical enhancement could make progress on development of secondary batteries.
APA, Harvard, Vancouver, ISO, and other styles
7

Preuss, Kathryn Elvia. "Sulfur nitrogen heterocycles as charge transfer materials." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0018/NQ53510.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Makenya, Amon Raphael. "Industrial application of sulfur concrete : an environment-friendly construction material /." Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3239.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

LEMOS, Janyelle de Oliveira. "Caracterização de gleissolos com e sem tiomorfismo da região litorânea do estado de Pernambuco." Universidade Federal Rural de Pernambuco, 2013. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5147.

Full text
Abstract:
Submitted by (lucia.rodrigues@ufrpe.br) on 2016-08-02T11:57:56Z No. of bitstreams: 1 Janyelle de Oliveira Lemos.pdf: 3894911 bytes, checksum: 9f9b7d66408b0015fd2de9373d685881 (MD5)
Made available in DSpace on 2016-08-02T11:57:56Z (GMT). No. of bitstreams: 1 Janyelle de Oliveira Lemos.pdf: 3894911 bytes, checksum: 9f9b7d66408b0015fd2de9373d685881 (MD5) Previous issue date: 2013-06-17
The floodplain soils of Pernambuco state - Brazil have been widely used to agriculture and their improperly management has promoted, in those with sulphidric materials, the sulfurization process, generating acidity in the soil, and release of heavy metals such iron. The aim of this study was to characterize Gleysol in areas of coastal wetlands along the shoreline of Pernambuco state cultivated with sugar cane, trying to understand genesis and occurrence of acid sulphate soils. Thus, we studied three floodplain soils along the shoreline of Pernambuco: floodplain soil in Goiana river (profile 1), floodplain soils in Sirinhaém river (profiles 2, 3 and 4) and floodplain soils in Ipojuca river (profiles 5, 6 and 7). Were realized a morphological characterization of soils, chemical analyzes for the purpose of soil classification, sequential extraction and total content of iron, and mineralogical analysis using XRD. Was observed predominance of the clay fraction in all profiles, which is consistent with the depositional environment in waters with low kinetic energy. The profiles 2, 3 and 4 showed extremely acidic reaction, with pH values below 2.5, indicating the presence of sulfuric horizon. The presence of sulphidric materials in the profiles 2, 3 and 4, confirmed the presence of sulfuric horizon. The sulfuric horizons in the profiles 2, 3 and 4 had high EC values between 9 and 21 dS m-1, being consistent with the high concentrations of sulphate generated by sulfurization process. The higher levels of iron were found associated with forms of poorly crystalline oxyhydroxides, values between 0.03 and 1.56 mmol kg-1. The assembly mineralogical soil had become very influenced by the geology of the basin of the rivers that bathe the floodplains. In the clay fraction were identified illite, kaolinite, goethite and smectite (beidellite/montmorillonite and nontronite), the silt fraction were: Illite, kaolinite, quartz and feldspar, in the sand fraction were: quartz, feldspar, mica and kaolinite. The floodplain soils showed morphological, physical, chemical and mineralogical related to the origin of the sediments and their position in the landscape. The occurrence of acid sulphate soils was detected only in the floodplain of Sirinhaem river.
Os solos de várzeas do litoral Pernambucano têm sido bastante utilizados na agricultura e o seu manejo inadequado tem promovido, naqueles que apresentam materiais sulfídricos, o processo de sulfurização, gerando acidez no solo, além de liberação de metais a exemplo do ferro. O objetivo deste trabalho foi caracterizar Gleissolos em áreas de várzeas litorâneas ao longo do litoral Pernambucano cultivadas com cana-de-açúcar, buscando compreender sua gênese e a ocorrência de solos Tiomórficos. Para tanto, foram avaliados solos de três várzeas ao longo do litoral Pernambucano: várzea do rio Goiana (perfil 1), várzea do rio Sirinhaém (perfis 2, 3 e 4) e várzea do rio Ipojuca (perfis 5, 6 e 7). Foi realizada a caracterização morfológica dos solos, análises químicas para fins de classificação do solo, extração sequencial e total do ferro, além de análise mineralógica utilizando DRX. Observou-se predominância da fração argila em todos os perfis, que condiz com o ambiente de deposição em águas com baixa energia cinética. Os perfis 2, 3 e 4 apresentaram reação extremamente ácida, chegando a atingir valores de pH inferiores a 2,5, evidenciando a presença de horizonte sulfúrico. A presença de materiais sulfídricos nos perfis 2, 3 e 4, confirmou a existência de horizonte sulfúrico. Os horizontes sulfúricos dos perfis 2, 3 e 4 apresentaram alta C.E., com valores variando entre 9 e 21 dS m-1, estando condizente com as altas concentrações de sulfato gerado pelo processo de sulfurização. Os maiores teores de ferro foram encontrados associados às formas de oxihidróxidos de baixa cristalinidade, apresentando valores entre 0,03 e 1,56 mmol kg-1. A assembléia mineralógica dos solos apresentou-se bastante influenciada pela geologia da bacia dos rios que banham as várzeas. Na fração argila os minerais identificados foram: ilita, caulinita, goethita e esmectita (beidelita/nontronita e montmorilonita); na fração silte foram: Ilita, caulinita, quartzo e feldspato; na fração areia foram: quartzo, feldspato, mica e caulinita. Os solos de várzeas apresentaram propriedades morfológicas, física, químicas e mineralógicas relacionadas à origem dos sedimentos e sua posição na paisagem. A ocorrência de Gleissolos Tiomórficos foi constatada somente na várzea do rio Sirinhaém.
APA, Harvard, Vancouver, ISO, and other styles
10

Wang, Dunyang. "Fundamental Studies of Lithium-sulfur Reaction Intermediates." Thesis, University of California, Berkeley, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10930612.

Full text
Abstract:

Lithium-sulfur (Li-S) batteries have been considered as an attractive alternative to current Li-ion batteries due to their large theoretical capacity (1672 mA-h/g) and theoretical energy density (2600 Wh/kg) while having a low cost, an abundance of the material, and relatively non-toxic properties. However, the low cyclability and significant capacity fading during the first several cycles prevent Li-S rechargeable batteries from being commercialized. During discharge, elemental sulfur is reduced to the final product Li2S through a series of soluble intermediate species, lithium polysulfides (Li2S x, 2 ≤ x ≤ 8). Lithium polysulfides dissolved into the electrolyte in the separator can no longer participate in redox reductions, resulting in a loss of active materials, as well as a “shuttling effect” that causes capacity fading and low coulombic efficiency. Despite the fact that decades of research have attempted to solve this, the problem is still not resolved due to a lack of fundamental understanding of the system. This includes how lithium polysulfides are produced during discharge interactions with other components in the cell and the reaction mechanisms (the electrochemical and chemical processes) during cycling. The objective of this dissertation is to provide a fundamental understanding of lithium polysulfides produced during discharge of a Li-S cell. This is an essential piece of knowledge when designing and identifying the issues associated with Li-S batteries.

To begin, the morphology, thermal properties, and ionic conductivity of an ether-based nanostructured block copolymer containing lithium polysulfides were investigated. Previous work has shown that nanostructured block copolymer electrolytes containing an ion-conducting block and modulus-strengthening block has the potential of enabling solid-state lithium metal rechargeable batteries. This is of particular interest for a lithium-sulfur battery to fully explore its high energy density and capacity. Understanding the thermal and electrochemical properties of these block copolymer electrolytes containing lithium polysulfides is essential for evaluating their potential use in Li-S batteries. A systematic study of polystyrene-b-poly(ethylene oxide) (SEO) block copolymer mixed with Li2Sx with an average x value of 4 and 8 was conducted. Small angle X-ray scattering, differential scanning calorimetry, and ac impedance spectroscopy were used to measure the morphology, thermal properties, and ionic conductivities of all samples. The ionic conductivity of SEO/Li2Sx mixtures were compared with those of poly(ethylene oxide) (PEO) mixed with Li2Sx to quantify the effect of nanostructuring on ion transport. The conductivities of both SEO and PEO samples containing polysulfides with a longer average chain length higher than the same polymer containing polysulfides with a shorter average chain length at all salt concentrations, indicating that dissociation of long-chain polysulfides occurs more readily than short-chain polysulfides. Normalized conductivity was used to quantify the effect of morphology on ion transport. The results showed that SEO suppressed the migration of polysulfides relative to PEO. However, this suppression is inadequate for practical applications. In other words, cathode architectures that prevent polysulfides from entering the electrolyte are necessary for enabling Li-S batteries with block copolymer electrolytes. Nevertheless, the results obtained in this study are important as they enable quantification of polysulfide migration in Li-S batteries with imperfect polysulfide encapsulation, a limitation that applies to all known Li-S batteries.

Next, UV-vis spectroscopy with radiation wavelength in the range 200 - 800 nm was used to study different polysulfides in ether. Ex-situ UV-vis spectra were measured for chemically synthesized lithium polysulfides in TEGDME, Li2 Sx_mix | TEGDME solutions for xmix values of 4, 6, 8, and 10 and sulfur concentrations of 10, 50, and 100 mM. The peaks are generally more resolved at lower concentrations than at higher concentrations for all xmix values, suggesting a concentration dependence of spectra shape. The peak at 617 nm was used to confirm the existence of S3 •- radical anion, which supports the argument that polysulfide radical anions are stable in ether-based electrolytes, and may play an important role in Li-S reaction mechanism. Using in-situ UV-vis method was discussed and challenges for Li-S reaction mechanism study were evaluated. A new fluorinated-ether based electrolyte was explored. Its low polysulfide solubility makes it a good candidate to be used in in-situ Li-S reaction studies because UV-vis radiations do not have a large penetration path through high concentration of polysulfide-containing materials. However, the main challenge in using UV-vis spectroscopy to study Li-S reaction mechanism is the ambiguity in peak assignments arised both from a lack of spectra standards for different polysulfides. It is difficult to experimentally obtain polysulfide spectra standards because polysulfides cannot be separated. (Abstract shortened by ProQuest.)

APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Sulfuric material"

1

McBee, William C. Sulfur construction materials. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

McBee, William C. Sulfur construction materials. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

P, Bennett James. Corrosion resistance of selected ceramic materials to sulfuric acid. [Pittsburgh, Pa.]: U.S. Dept. of the Interior, Bureau of Mines, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ober, Joyce A. The materials flow of sulfur. Reston, VA: U.S. Dept. of the Interior, U.S. Geological Survey, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

National Association of Corrosion Engineers. Materials for the handling and storage of concentrated (90 to 100%) sulfuric acid at ambient temperatures. Houston: NACE, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Steger, Henry F. HCC-1 and INM-1--pyrometallurgical CRMs for sulphur. Ottawa: Energy, Mines and Resources Canada, Canada Centre for Mineral and Energy Technology, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

International, Symposium on Present and Future Raw Material and Fertilizer Sulphur Requirements for China (1993 Beijing China). Proceedings of the International Symposium on Present and Future Raw Material and Fertilizer Sulphur Requirements for China: June 15-17, 1993, Beijing, China = [Zhongguo liu zi yuan he liu fei xu qiu de xian zhuang he zhan wang : guo ji xue shu tao lun hui lun wen ji]. [Washington, DC]: The Institute, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Zhou, Guangmin. Design, Fabrication and Electrochemical Performance of Nanostructured Carbon Based Materials for High-Energy Lithium–Sulfur Batteries. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3406-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Great Britain. Standing Committee of Analysts., ed. Determination of sulphite, sulfur dioxide, thiosulphate, and thiocyanate: With notes on the determination of total sulphur and other sulfur compounds, 1985 : methods for the examination of waters and associated materials. London: H.M.S.O., 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

International, NACE. Petroleum and natural gas industries: Materials for use in H2S-containing environments in oil and gas production = Industries du pe trole et du gaz naturel - Mate riaux pour utilisation dans des environnements contenant de l'hydroge ne sulfure (H2S) dans la production de pe trole et de gaz. 2nd ed. Houston, Tex: NACE, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Sulfuric material"

1

Heider, W., R. Förthmann, and A. Naoumidis. "Corrosion Resistance of SiSiC Tube Material under Thermal Cycling Conditions of a Solar Heated Sulfuric Acid-Iodine Process Plant." In Solar Thermal Energy Utilization. German Studies on Technology and Application, 19–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84799-8_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Heider, W., R. Förthmann, and A. Naoumidis. "Corrosion Resistance of SiSiC Tube Material under the Specific Conditions of a Solar Heated Sulfuric Acid-Iodine Process Plant." In Solar Thermal Energy Utilization. German Studies on Technology and Application, 193–215. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-662-09931-5_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Tsuchiya, Hiroaki, Jan M. Macak, Irina Sieber, and Patrik Schmuki. "Anodic Porous Zirconium Oxide Prepared in Sulfuric Acid Electrolytes." In Materials Science Forum, 205–10. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-996-2.205.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Liu, Zengcai, Wujun Fu, and Chengdu Liang. "Lithium-Sulfur Batteries." In Handbook of Battery Materials, 811–40. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527637188.ch24.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Grogan, J., G. M. Martins, and C. G. Anderson. "Dezincing of Galvanized Steel by Sulfuric Acid Leaching." In The Minerals, Metals & Materials Series, 1733–42. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95022-8_143.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Delong, L. Mark L. "Materials Challenges in Strong Nitric and Sulfuric Acid Service." In ACS Symposium Series, 245–54. Washington, DC: American Chemical Society, 2013. http://dx.doi.org/10.1021/bk-2013-1155.ch016.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ryu, Ho Suk, Cheol Wan Park, Won-Cheol Shin, Tae-Bum Kim, Jai Young Lee, and Hyo Jun Ahn. "Discharge-Charge Property of Lithium/PEO/Sulfur Battery with High Sulfur Content." In Materials Science Forum, 634–37. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-966-0.634.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Cao, Y., P. Smith, and A. J. Heeger. "Polyaniune Processed from Sulfuric Acid and in Solution in Sulfuric Acid: Electrical, Optical and Magnetic Properties." In Conjugated Polymeric Materials: Opportunities in Electronics, Optoelectronics, and Molecular Electronics, 171–93. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2041-5_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Choi, Young Jin, Sang Sik Jeong, Ki Won Kim, Hyo Jun Ahn, and Jou Hyeon Ahn. "Effects on the Carbon Matrix as Conductor in Sulfur Electrode for Lithium/Sulfur Battery." In Materials Science Forum, 1082–85. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.1082.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Wang, Zhenhua. "Cathode Materials for Lithium-Sulfur Batteries." In Advanced Electrochemical Materials in Energy Conversion and Storage, 129–44. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003133971-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Sulfuric material"

1

Ioka, Ikuo, Yoshiro Kuriki, Jin Iwatsuki, Daisuke Kawai, Yoshiyuki Inagaki, Shinji Kubo, and Yoshiyuki Inagaki. "Corrosion Property of Container Using Hybrid Material for Thermal Decomposition Process of Sulfuric Acid." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16783.

Full text
Abstract:
Abstract A thermochemical water-splitting iodine-sulfur process (IS process) is one of candidates for the large-scale production of hydrogen using heat from nuclear energy. Severe corrosive environment which is thermal decomposition of sulfuric acid exists in the IS process. To achieve an industrialization of massive hydrogen production system, one of the key factors is the development of structural materials for the severe corrosive environment. A hybrid material with the corrosion-resistance and the ductility had been made by a silicon powder plasma spraying and laser treatment. To confirm the applicability of the hybrid material as the structural material, corrosion tests of the hybrid materials had been performed in 95 mass% and 47 mass% boiling sulfuric acid. The corrosion resistance of specimen in the condition of 95 mass% boiling sulfuric acid had been excellent. This was attributed to the formation of SiO2 on the surface. To confirm the production characteristics as a container using the hybrid material, the container which has a welded part, a chamfer, a curved surface had been experimentally made. A configuration of the container had been 150mm inside diameter, 120mm in height and 6mm in thickness. The substrate of the container made of Hastelloy C276® superalloy had included TIG weld part. To improve the corrosion resistance of the container, pre-oxidation was performed at 800°C for 100 hours in air. There was no detachment of the plasma spraying and laser treated layer on the base metal and the welded part. The pre-oxidized container using hybrid technique was prepared for the corrosion test in boiling sulfuric acid to evaluate the characteristics of the container.
APA, Harvard, Vancouver, ISO, and other styles
2

Kim, Hong Pyo, Dong-Jin Kim, Hyuk Chul Kwon, Ji Yeon Park, and Yong Wan Kim. "Corrosion of the Materials in Sulfuric Acid." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58007.

Full text
Abstract:
The program for hydrogen production with high temperature nuclear heat has been launched in Korea since 2004. Iodine sulfur (IS) process is one of the promising processes for a hydrogen production because it does not generate a carbon dioxide and massive hydrogen production may be possible. However, the highly corrosive environment of the process is barrier to the application in the industry. Therefore, corrosion behaviors of various materials were evaluated in sulfuric acid to select appropriate materials compatible with the IS process. The materials used in this work were Ni base alloys, Fe-Si alloys, Ta, Au, Pt, Zr, SiC and so on. The test environments were boiling 50wt% sulfuric acid without/with HI as an impurity and 98wt% sulfuric acid. The surface morphologies and cross sectional areas of the corroded materials were examined by using SEM equipped with EDS. From the results of the weight loss and potentiodynamic experiments, it was found that a Si enriched oxide is attributable to a corrosion resistance for materials including Si in boiling 98wt% sulfuric acid. Moreover the passive Si enriched film thickness increased with the immersion time leading to an enhancement of the corrosion resistance. Corrosion behaviours of the material tested are discussed in terms of the chemical composition of the materials, a corrosion morphology and the surface layer’s composition.
APA, Harvard, Vancouver, ISO, and other styles
3

Fukui, Hiroshi, Isao Minatsuki, and Kazuo Ishino. "A Development of Ceramics Cylinder Type Sulfuric Acid Decomposer for Thermo-Chemical Iodine-Sulfur Process Pilot Plant." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89705.

Full text
Abstract:
The hydrogen production method applying thermo-chemical Iodine-Sulfur process (IS process) which uses a nuclear high temperature gas cooled reactor is world widely greatly concerned from the view point of a combination as a clean method, free carbon dioxide in essence. In this process, it is essential a using ceramic material, especially SiC because a operation condition of this process is very corrosive due to a sulfuric acid atmosphere with high temperature and high pressure. In the IS process, a sulfuric acid decomposer is the key component which performs evaporating of sulfuric acid from liquid to gas and disassembling to SO2 gas. SiC was selected as ceramic material to apply for the sulfuric acid decomposer and a new type of binding material was also developed for SiC junction. This technology is expected to wide application not only for a sulfuric acid decomposer but also for various type components in this process. Process parameters were provided as design condition for the decomposer. The configuration of the sulfuric acid decomposer was studied, and a cylindrical tubes assembling type was selected. The advantage of this type is applicable for various type of components in the IS process due to manufacturing with using only simple shape part. A sulfuric acid decomposer was divided into two regions of the liquid and the gaseous phase of sulfuric acid. The thermal structural integrity analysis was studied for the liquid phase part. From the result of this analysis, it was investigated that the stress was below the strength of the breakdown probability 1/100,000 at any position, base material or junction part. The prototype model was manufactured, which was a ceramic portion in the liquid phase part, comparatively complicated configuration, of a sulfuric acid decomposer. The size of model was about 1.9m in height, 1.0m in width. Thirty-six cylinders including inlet and outlet nozzles were combined and each part article was joined using the new binder (slurry binder) and calcinated. Final polishing of the flange faces established in the entrance nozzles was also satisfactory. Many parts were joinable using new technology (new binder). For this reason, new technology is applicable to manufacture of not only a sulfuric acid decomposer but the instruments in the IS process, or other chemical processes.
APA, Harvard, Vancouver, ISO, and other styles
4

Simatupang, Partogi H. "Characteristics of alkali activated material (geopolymer) in sulfuric acid solution." In GREEN CONSTRUCTION AND ENGINEERING EDUCATION FOR SUSTAINABLE FUTURE: Proceedings of the Green Construction and Engineering Education (GCEE) Conference 2017. Author(s), 2017. http://dx.doi.org/10.1063/1.5003511.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Hu, Tzu-Yu, Sarah M. Connolly, Edward J. Lahoda, and Willem Kriel. "Design and Cost of the Sulfuric Acid Decomposition Reactor for the Sulfur Based Hydrogen Processes." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58009.

Full text
Abstract:
The key interface component between the reactor and chemical systems for the sulfuric acid based processes to make hydrogen is the sulfuric acid decomposition reactor. The materials issues for the decomposition reactor are severe since sulfuric acid must be heated, vaporized and decomposed. SiC has been identified and proven by others to be an acceptable material. However, SiC has a significant design issue when it must be interfaced with metals for connection to the remainder of the process. Westinghouse has developed a design utilizing SiC for the high temperature portions of the reactor that are in contact with the sulfuric acid and polymeric coated steel for low temperature portions. This design is expected to have a reasonable cost for an operating lifetime of 20 years. It can be readily maintained in the field, and is transportable by truck (maximum OD is 4.5 meters). This paper summarizes the detailed engineering design of the Westinghouse Decomposition Reactor and the decomposition reactor’s capital cost.
APA, Harvard, Vancouver, ISO, and other styles
6

Vega-Baudrit, José Roberto, and Melissa Camacho. "Pineapple Biorefinery in Costa Rica." In I Congreso Internacional de Ciencias Exactas y Naturales. Universidad Nacional, 2019. http://dx.doi.org/10.15359/cicen.1.72.

Full text
Abstract:
Pineapple peel’s biomass was used as a raw material for nanocellulose extraction. The raw material was a residue from the fruit industry from Costa Rica. The nanocellulose was obtained by hydrolysis of the pineapple peel residues after NaOH and hypochlorous acid with hydrochloric acid (HCl) for the microcellulose formation and with sulfuric acid (H2SO4) for nanocellulose formation. Properties were analyzed by FTIR, TGA, DLS, zeta potential, AFM and SEM. The results showed that nanocellulose with a fiber like structure was preferentially obtained after 60 min in contact with sulfuric acid.
APA, Harvard, Vancouver, ISO, and other styles
7

Ghosh, Arindam, Venkateswarlu Kondur, and Ajit Kumar Roy. "Tensile Behavior of Nb7.5Ta for Heat-Exchanger Applications." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26490.

Full text
Abstract:
Hydrogen generation using sulfur-iodine cycle involves the formation and decomposition of sulfuric acid and hydrogen iodide (HI). The decomposition of HI has been proposed to occur at a maximum temperature of 400°C. Nb7.5Ta has been identified as a candidate structural material for use in heat-exchanger during the decomposition of HI. This paper presents the results of tensile testing at temperatures ranging from ambient to 400°C. A gradual drop in tensile strength was noted with increasing temperature. Reduced failure strain was observed at temperatures up to 300°C, which is known to be associated with the occurrence of dynamic strain aging (DSA). Since the concentration of precipitate and dislocations can influence the DSA behavior of susceptible materials, efforts are in progress to characterize dislocations using transmission electron microscopy. All tested specimens exhibited ductile failures, characterized by dimples.
APA, Harvard, Vancouver, ISO, and other styles
8

Samoylenko, V. V., M. G. Golkovski, I. S. Ivanchik, I. K. Chakin, and I. A. Polyakov. "Composite material of the Ti-Ta-Zr system intended to work in boiling sulfuric and hydrochloric acids." In 8th International Congress on Energy Fluxes and Radiation Effects. Crossref, 2022. http://dx.doi.org/10.56761/efre2022.n3-o-042501.

Full text
Abstract:
The paper presents the results of a study of relatively thick corrosion-resistant coatings of the Ti-Ta-Zr system. The coatings are obtained by surfacing powder mixtures on a titanium base using a focused electron beam emitted into the air atmosphere. It was shown in previous works that the coatings of the Ti-Ta-Nb system obtained in this way are resistant to boiling concentrated nitric acid, but not sufficiently resistant to two other boiling strong acids: sulfuric and hydrochloric. The purpose of this work is to overcome this shortcoming by forming a fused deposited layer of the Ti-Ta-Zr system with a high degree of alloying, resulting in a coating that is resistant to all three of the mentioned strong acids at their boiling temperatures.
APA, Harvard, Vancouver, ISO, and other styles
9

Sugawara, Sougoro, Zulkarnain A. Noorden, Ryohei Okaoto, and Satoshi Matsumoto. "New carbon material derived from mixture with lubricating oil and sulfuric acid and its electric property for EDLC." In 2012 IEEE International Conference on Condition Monitoring and Diagnosis (CMD). IEEE, 2012. http://dx.doi.org/10.1109/cmd.2012.6416451.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

R., Arryan Jibril, Prinanda Doni Santoso, Agus Budi Prasetyo, Ahmad Maksum, Reza Miftahul Ulum, and Johny Wahyuadi Soedarsono. "The effect of leaching time and concentration of sulfuric acid on increasing nickel and cobalt content from ferronickel slag waste after alkaline fusion using sodium carbonate." In INTERNATIONAL CONFERENCE ON TRENDS IN MATERIAL SCIENCE AND INVENTIVE MATERIALS: ICTMIM 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0014051.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Sulfuric material"

1

Remick, R. J., T. L. Osif, and M. G. Lawson. Sulfur-tolerant anode materials: Final report. Office of Scientific and Technical Information (OSTI), September 1988. http://dx.doi.org/10.2172/5766208.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Chriswell, C. D., G. A. Norton, S. S. Akhtar, W. E. Straszheim, and R. Markuszewski. Annotated bibliography of methods for determining sulfur and forms of sulfur in coal and coal-related materials. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/10189947.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Nguyen, D. T. Corrosion resistance and behavior of construction materials exposed to dilute sulfuric acid at elevated temperatures under static conditions. Office of Scientific and Technical Information (OSTI), October 1994. http://dx.doi.org/10.2172/10190293.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kim, Do Heui, George G. Muntean, Charles H. F. Peden, Ken Howden, Randy Stafford, John Stang, Aleksey Yezerets, Neal Currier, H. Y. Chen, and H. Hess. CRADA Final Report: Mechanisms of Sulfur Poisoning of NOx Adsorber Materials. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/1334911.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kolodziejczyk, Bart. Unsettled Issues Concerning the Use of Green Ammonia Fuel in Ground Vehicles. SAE International, February 2021. http://dx.doi.org/10.4271/epr2021003.

Full text
Abstract:
While hydrogen is emerging as a clean alternative automotive fuel and energy storage medium, there are still numerous challenges to implementation, such as the economy of hydrogen production and deployment, expensive storage materials, energy intensive compression or liquefaction processes, and limited trial applications. Synthetic ammonia production, on the other hand, has been available on an industrial scale for nearly a century. Ammonia is one of the most-traded commodities globally and the second most-produced synthetic chemical after sulfuric acid. As an energy carrier, it enables effective hydrogen storage in chemical form by binding hydrogen atoms to atmospheric nitrogen. While ammonia as a fuel is still in its infancy, its unique properties render it as a potentially viable candidate for decarbonizing the automotive industry. Yet, lack of regulation and standards for automotive applications, technology readiness, and reliance on natural gas for both hydrogen feedstocks to generate the ammonia and facilitate hydrogen and nitrogen conversion into liquid ammonia add extra uncertainty to use scenarios. Unsettled Issues Concerning the Use of Green Ammonia Fuel in Ground Vehicles brings together collected knowledge on current and future prospects for the application of ammonia in ground vehicles, including the technological and regulatory challenges for this new type of clean fuel.
APA, Harvard, Vancouver, ISO, and other styles
6

Bannochie, C. J., and B. J. Wiedenman. Examination Of Sulfur Measurements In DWPF Sludge Slurry And SRAT Product Materials. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1057005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Vetter, Thomas W. Certification of Standard Reference Material® 2693a Bituminous Coal (Nominal Mass Fraction 0.5 % Sulfur). Gaithersburg, MD: National Institute of Standards and Technology, 2022. http://dx.doi.org/10.6028/nist.sp.260-230.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Vetter, Thomas W. Certification of Standard Reference Material® 2693a Bituminous Coal (Nominal Mass Fraction 0.5 % Sulfur). Gaithersburg, MD: National Institute of Standards and Technology, 2022. http://dx.doi.org/10.6028/nist.sp.260.230.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kingston, A. W., O. H. Ardakani, G. Scheffer, M. Nightingale, C. Hubert, and B. Meyer. The subsurface sulfur system following hydraulic stimulation of unconventional hydrocarbon reservoirs: assessing anthropogenic influences on microbial sulfate reduction in the deep subsurface, Alberta. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330712.

Full text
Abstract:
Hydraulic fracturing is a reservoir stimulation technique that involves the injection of high-pressure fluids to enhance recovery from unconventional hydrocarbon reservoirs. Often this involves the injection of surface waters (along with additives such as biocides) into formational fluids significantly different isotopic and geochemical compositions facilitating geochemical fingerprinting of these fluid sources. In some instances, the produced fluids experience an increase in hydrogen sulfide (H2S) concentration over the course of production resulting in an increased risk to health and safety, the environment, and infrastructure due to the toxic and corrosive nature of H2S. However, questions remain as to the origin and processes leading to H2S formation following hydraulic fracturing. In this study, we analyzed a series of produced waters following hydraulic fracturing of a horizontal well completed in the Montney Formation, Western Canada to evaluate variations in geochemical and microbiological composition over time and characterize potential sulfur species involved in the production of H2S. Initially, sulfur isotope ratios (d34S, VCDT) of dissolved sulfate in produced water had a baseline value of 27per mil similar to the d34S value of 25per mil for solid anhydrite derived from core material. Subsequently, d34S values of sulfate in produced fluids sequentially increased to 35per mil coincident with the appearance of sulfides in produced waters with a d34SH2S value of 18per mil. Oxygen isotope values of dissolved sulfate exhibited a synchronous increase from 13.2per mil to 15.8per mil VSMOW suggesting sulfate reduction commenced in the subsurface following hydraulic fracturing. Formation temperatures are <100°C precluding thermochemical sulfate reduction as a potential mechanism for H2S production. We suggest that microbial reduction of anhydrite-derived sulfate within the formation is likely responsible for the increase in H2S within produced waters despite the use of biocides within the hydraulic fracturing fluids. Initial assessments of microbial communities indicate a shift in community diversity over time and interactions between in situ communities and those introduced during the hydraulic fracturing process. This study indicates that biocides may not be fully effective in inhibiting microbial sulfate reduction and highlights the role anthropogenic influences such as hydraulic fracturing can have on the generation of H2S in the subsurface.
APA, Harvard, Vancouver, ISO, and other styles
10

Dewitt, J. X-Ray Absorption Spectroscopic Studies of the Dinuclear Iron Center in Methane Monooxygenase and the Sulfure and Chlorine Centers in Photographic Materials. Office of Scientific and Technical Information (OSTI), June 2018. http://dx.doi.org/10.2172/1454092.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Sulfuric material' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography