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Статті в журналах з теми "Fly Ash Cenosphere"
Manоcha, L. M., K. A. Ram, and S. M. Manocha. "Separation of Cenospheres from Fly Ashes by Floatation Method." Eurasian Chemico-Technological Journal 13, no. 1-2 (December 21, 2010): 89. http://dx.doi.org/10.18321/ectj72.
Повний текст джерелаLiu, Zhongwei, Kang Zhao, Yufei Tang, and Chi Hu. "Preparation of a Cenosphere Curing Agent and Its Application to Foam Concrete." Advances in Materials Science and Engineering 2019 (March 3, 2019): 1–9. http://dx.doi.org/10.1155/2019/7523492.
Повний текст джерелаYoriya, Sorachon, and Phattarathicha Tepsri. "Separation Process and Microstructure-Chemical Composition Relationship of Cenospheres from Lignite Fly Ash Produced from Coal-Fired Power Plant in Thailand." Applied Sciences 10, no. 16 (August 10, 2020): 5512. http://dx.doi.org/10.3390/app10165512.
Повний текст джерелаWrona, Jan, Witold Żukowski, Dariusz Bradło, and Piotr Czupryński. "Recovery of Cenospheres and Fine Fraction from Coal Fly Ash by a Novel Dry Separation Method." Energies 13, no. 14 (July 11, 2020): 3576. http://dx.doi.org/10.3390/en13143576.
Повний текст джерелаYoriya, Sorachon, and Phattarathicha Tepsri. "Crystal Growth on Cenospheres from High-Calcium Fly Ash." Crystals 11, no. 8 (August 7, 2021): 919. http://dx.doi.org/10.3390/cryst11080919.
Повний текст джерелаSoh, Wei Ming, Jully Tan, Jerry Y. Y. Heng, and Christopher Cheeseman. "Production of Cenospheres from Coal Fly Ash through Vertical Thermal Flame (VTF) Process." Materials Science Forum 880 (November 2016): 7–10. http://dx.doi.org/10.4028/www.scientific.net/msf.880.7.
Повний текст джерелаAsavavisithchai, Seksak, and Attanadol Prapajaraswong. "Effects of Different Types of Power Plant Ashes on Foamability and Structure of Al Foams." Advanced Materials Research 770 (September 2013): 10–13. http://dx.doi.org/10.4028/www.scientific.net/amr.770.10.
Повний текст джерелаSuresha, Bheemappa, Shivaprakash Vidyashree, and Harshavardhan Bettegowda. "Effect of Filler Materials on Abrasive Wear Performance of Glass/Epoxy Composites." Tribology in Industry 45, no. 1 (March 15, 2023): 111–20. http://dx.doi.org/10.24874/ti.1386.10.22.01.
Повний текст джерелаYoriya, Sorachon, and Phattarathicha Tepsri. "Investigation of Metal and Trace Elements of Cenospheres from Lignite High-Calcium Fly Ash (Thailand)." Water 13, no. 20 (October 19, 2021): 2935. http://dx.doi.org/10.3390/w13202935.
Повний текст джерелаYoon, Seyoon, and Inhwan Park. "Micropore Structures in Cenosphere-Containing Cementitious Materials Using Micro-CT." Advances in Materials Science and Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/3892683.
Повний текст джерелаДисертації з теми "Fly Ash Cenosphere"
Acar, Ilker. "Characterization And Utilization Potential Of Class F Fly Ashes." Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615688/index.pdf.
Повний текст джерелаatalagzi and Sugö
zü
thermal power plants were carried out and their utilization potentials in three different fields were examined. Characterization of sintered samples and determination of their utilization potentials in ceramic industry is the first research area in this thesis. For this purpose, the class F fly ash samples were first pressed into cylindrical specimen without the addition of any organic binders or inorganic additives, and then sintered to form ceramic materials. Effects of sintering temperature and time on sintering characteristics were investigated. In the experiments, the cylindrical specimens were first preheated to 300oC for 1 h to remove moisture and any other gases. The specimens were then fired at the temperatures of 1000oC, 1050oC, 1100oC and 1150oC for the sintering times of 0.5, 1.0, 1.5 and 2.0 hours. Heating rate of 10oC/min was kept constant throughout the experiments. Quality of sintered samples was evaluated in terms of ceramic specifications such as density, water absorption, porosity, shrinkage and splitting tensile strength. In addition, mineralogical and microstructural changes during sintering were determined with X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. According to literature data, better microstructure, the highest density and strength with the lowest porosity, water absorption and shrinkage values are the indications of the optimum sintering conditions. Based on these specifications, Sugö
zü
fly ash gave better results compared to Ç
atalagzi fly ash, and the optimum conditions were achieved at the sintering temperature of 1150oC for the sintering time of 1.5 hours for both samples. Pozzolanic reactivity of the fly ashes and their utilization potentials in civil engineering applications were also examined in detail during this study. For this purpose, Ç
atalagzi (CFA) and Sugö
zü
(SFA) fly ashes were first subjected to a specific hydraulic classification process developed at CAER (University of Kentucky, Center for Applied Energy Research) to recover ultrafine fly ash particles. The overflow products with average particle sizes of 5.2 &mu
m for CFA and 4.4 &mu
m for SFA were separated from the respective as-received samples with average particle sizes of 39 &mu
m and 21 &mu
m. After the classification stage, the pozzolanic activities of these ultrafine fly ash fractions (UFA) and as-received samples were examined by preparing a number of mortar (mixture of Portland cement (PC), FA or UFA as partial cement replacement, sand and water) and paste (mixture of PC, FA or UFA as partial cement replacement and water) specimens. Control samples containing only PC were also prepared and tested through the experiments for the comparison of the results. In the mortar experiments, three different PC replacement ratios by FA and UFA (10%, 20% and 30%) were used to examine the effects of FA and UFA samples on the fresh and hardened mortar properties such as water requirement, compressive strength, drying shrinkage and water expansion. These mortar tests indicated that ultrafine fractions of Ç
atalagzi (CUFA) and Sugö
zü
(SUFA) fly ashes provided more than 10% reduction in water demand compared to the control sample for 30% PC replacement. The mortar cubes containing CUFA and SUFA samples exhibited also higher strength development rates after 14 days compared to the ones with as-received samples and PC only. At the end of the curing age of 112 days, both CUFA and SUFA provided more than 40% increase in compressive strength compared to the control sample for the PC replacement ratios higher than 20%. As a comparison, SUFA gave better results than CUFA in both water demand and compressive strength tests. The mortar bars prepared with the both FA and UFA samples exhibited very low shrinkage and expansion values. These values decreased generally with increasing PC replacement ratio especially after 14 days. In the paste experiments, thermogravimetric analyses (TGA) of the paste specimens prepared by using only with 20% PC replacement were carried out to determine pozzolanic reactivity of the samples. The difference between the remaining Ca(OH)2 (portlandite) contents in the paste specimens containing the fly ashes and the reference PC paste was used as a measure of pozzolanic reactivity. After 112 days, 68.56% and 62.68% Ca(OH)2 content of PC only pastes were obtained with the pastes containing CUFA and SUFA samples, respectively, corresponding to 11% and 13% more Ca(OH)2 consumptions in reference to the respective as-received samples. X-ray diffraction (XRD) analyses were also performed for comparison of main portlandite peak intensities in the paste specimens containing FA or UFA with those in the PC only paste during cement hydration. According to these XRD analyses, portlandite content in PC/UFA pastes decreased significantly after 14 days compared to the PC only paste. All of these tests and analyses showed that a highly reactive lower cost pozzolan with very fine particle size and higher surface area compared to regular fly ash pozzolans can be produced from both Ç
atalagzi and Sugö
zü
fly ashes using a relatively simple hydraulic classification technology. Cenosphere recovery potentials from Ç
atalagzi and Sugö
zü
fly ashes were also studied in this thesis. Determination of cenosphere content was done under optical microscope by particle counting on the basis of point and area. Based on the point-counting data, CFA and SFA samples originally contain 11.30% and 4.50% cenospheres, respectively. Variations of cenosphere contents in the fly ash samples were examined by using float-sink, screening and air classification tests. The results pointed out that cenosphere contents decreased with decreasing size and increasing density for both samples. According to the float-sink tests, Ç
atalagzi fly ash has much more floating products and more cenospheres than Sugö
zü
fly ash for the same density interval. Based on the air classification results, cenospheres were concentrated in the underflow products, and cenosphere contents increased with increasing air pressure and decreasing motor speed for both samples. The most efficient cenosphere separation technique among the examined methods was screening. Cenosphere contents of CFA and SFA increased to 21.65% and 11.83%, respectively by only using simple screening through 38 &mu
m.
Biju-Duval, Paul M. "A new porous material based on cenospheres." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/26523.
Повний текст джерелаCommittee Chair: Dr. Mulalo Doyoyo; Committee Member: Dr. Arash Yavari; Committee Member: Dr. Kenneth M. Will. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Sopko, Marek. "Možnosti snížení surovinových nákladů při výrobě kordieritu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225884.
Повний текст джерелаCacuro, Thiago Aguiar. "Caracterização de cinzas de queima de bagaço de cana-de-açúcar e prospecção de sua utilização como adsorvente." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/8941.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
The ashes resulting from the burning of sugarcane bagasse is a heterogeneous material and has various applications as an adsorbent. To enhance and assist in prospecting new applications is critical to better understand the properties of the material. In this work, its morphological, spectroscopic and elemental characterization of the ashes of sugarcane bagasse from three different plants and two different harvests and the prospect of its use as an adsorbent. The particles of the ash were separated according to their density and in order to characterize, FTIR was used in the investigation of chemical groups present in the samples, additionally to the SEM and EDS elemental and morphological characterization of the particles present in the samples. Cenospheres, spherical particles present in ash, were identified as coreshell structure, where the core is a mixed metal oxide and the shell is a layer of silicon dioxide. The correlation between the ratio of the relative abundance between the carbonyl and hydroxyl groups and the mass distribution of the granulometric extracts were used as indirect measure of the level of oxidation of the samples. The ashes’ adsorption capacity showed affinity for the methylene blue dye with an adsorption capacity of 39 mg of dye per gram of ash used, in contrast to the low adsorption of potassium chromate solution, 1.2 mg per gram of ash.
As cinzas oriundas do processo de queima do bagaço de cana-de-açúcar são um material heterogêneo e com diversas aplicações, como a adsorção. Para potencializar e auxiliar na prospecção de novas aplicações é fundamental conhecer melhor as propriedades do material. Neste trabalho foi feita esta caracterização morfológica, espectroscópica e elementar das cinzas do bagaço da cana-de-açúcar provenientes de três diferentes usinas e duas diferentes safras e a prospecção de seu uso como adsorvente. As partículas das cinzas foram separadas de acordo com sua densidade e para a caracterização foi utilizada a técnica de FTIR na investigação dos grupos químicos presentes nas amostras e MEV juntamente com o EDS para a caracterização morfológica e elementar. As cenosferas, partículas esféricas presentes nas cinzas, foram identificadas como estruturas coreshell onde o core é composto por um misto de óxidos metálicos e o shell composto por dióxido de silício. A correlação entre a razão da abundância relativa entre os grupos de carbonila e hidroxila e a distribuição mássica dos extratos granulométricos, foi usada como medida indireta do nível de oxidação das diferentes amostras. Quanto à sua capacidade de adsorção, as cinzas mostraram afinidade na adsorção do corante azul de metileno com uma capacidade de adsorção de 39mg de corante por grama de cinza usada em contraste com a baixa adsorção apresentada para a solução de cromato de potássio com 1,2 mg por grama de cinza.
Kiani, Ali. "Concentration and recovery of positively buoyant cenospheres using an inverted REFLUX classifier." Thesis, 2017. http://hdl.handle.net/1959.13/1335572.
Повний текст джерелаThis thesis is concerned with investigating the application of the Inverted REFLUX™ Classifier (IRC™) for separating positively buoyant particles from other negatively buoyant particles. This innovative technology was investigated here for the first time to recover valuable cenospheres, less dense than water, from the fly ash waste of a coal fired power station. Annually, millions of tonnes of fly ash generated from burning coal are discarded to the land surrounding power stations, causing long-lasting environmental and health issues. Fly ash contains valuables components such as cenospheres, unburnt carbon, metals and trace elements. The cenospheres are hollow micro-shells consisting of oxides of silicon and aluminium. These particles represent one of the most valuable components found in fly ash, but at low levels of order 1 wt.%. The particles offer superior properties such as high insulation, high strength, and low density, and hence are valued sometimes up to $ 2000 per tonne. They are positively buoyant in water, and hence wet gravity separation offers the potential for their separation from the negatively buoyant fly ash particles. In this study, wet gravity separation in an Inverted REFLUX™ Classifier was investigated to recover and concentrate cenospheres. The Inverted REFLUX™ Classifier (IRC™) consisted of 1-metre long parallel inclined channels located underneath a 1-metre long vertical liquid fluidized bed. Downwards fluidization was supplied through a distributor at the top for the purpose of washing high density slimes from the low density cenospheres. The inclined channels enhanced the segregation rate of the cenosphere particles leading to a throughput advantage over a conventional fluidized bed. Following preliminary experiments it was shown, using the correlation derived by Laskovski et al. (2006), the throughput advantage of the IRC™ was 32. In other words, for a given separation performance, the feed rate per unit of vessel area to the IRC™ can be increased to a level 32 times higher than for a conventional fluidized bed. These preliminary studies were based on using a model feed, a mixture of commercial cenospheres and silica flour. Then, a real fly ash feed containing around 0.51 wt.% cenospheres was used. At a solids throughput of about 2.3 t/(m² h), a product grade of 76 wt.% and a recovery of about 42 wt.% were obtained, corresponding to an upgrade of about 151. By increasing the product rate, the recovery of cenospheres increased to about 64 wt.%, while the upgrade was reduced to 33. A more systematic study was then conducted using a new feed consisting of about 1 wt.% cenospheres, focussed on the role of the solids concentration in effecting enhanced segregation. Based on the study by Batchelor and Van Rensburg (1986), it was hypothesised that a bulk streaming phenomenon should develop in the inclined channels at sufficiently high cenosphere and fly ash concentrations. Different feed solids concentrations from 10 wt.% to 46 wt.% were used, for a fixed feed flow rate, fluidization rate, and volumetric split between the overflow and underflow. As the feed solids concentration increased from 10.1 wt.% to about 38.1 wt.%, the recovery of the cenospheres increased from 61.7 wt.% to an optimum recovery of 89.9 wt.%, before declining rapidly to a recovery of 60.2 wt.% at a feed solids concentration of about 46.4 wt.%. At the optimum feed solids concentration of 38.1 wt.%, the solids throughput was a remarkable 3.1 t/(m² h), and the upgrade in the cenospheres concentration was 58.6. The overall throughput advantage at the optimum condition was found to be 54, based on a partition curve analysis of the separation size of the cenospheres. More detailed analysis indicated that the inclined channels delivered a throughput advantage of 18, hence it was concluded that a further throughput advantage of 3 was most likely due to the bulk streaming phenomenon. The sharpest size classification was also evident at the optimum feed solids concentration, providing the d₂₅ = 31.5 μm, d₅₀ = 36.5 μm, and d₇₅ = 50.0 μm. The separation performance at the optimum feed solids concentration was further investigated at different feed flow rates and product split ratios, in order to provide the optimum operating conditions to be used in the pilot scale investigation. The potential to scale-up the process by a factor of 10 was investigated using a pilot scale device with cross-section 0.3 m × 0.3 m. The separation performance in the pilot scale IRC™ was compared with that obtained from the laboratory scale performance. The results were found to be consistent. At a solids throughput of about 4.1 t/(m² h), a cenosphere recovery of about 80 wt.% and a high upgrade of 19 were achieved while at a lower product split ratio, a slightly lower recovery of 75 wt.% and a higher upgrade of 38 were achieved. This part of the study provides the necessary basis for justifying a full scale investigation of this technology. The potential benefits of a multi-stage arrangement were also investigated. A fly ash feed with the cenosphere grade of about 0.9 wt.% was subjected to a three-stage IRC™ separation. At the end of the process, a very high grade product of about 97 wt.% (almost pure on a volume basis) was achieved. However, the overall three stage recovery fell to around 50 wt.%, mainly due to the low separation efficiency in Stage 2 of the process. In fact, the second stage involved a very dilute feed, and hence a likely explanation is the lack of the bulk streaming phenomenon under these conditions. It is therefore concluded that the single stage separation offers the best option. A further fly ash feed containing larger cenospheres at an even higher cenosphere concentration was examined in the IRC™. At a high solids throughput of 4.9 t/(m² h), the cenosphere recovery was found to be 93 wt.%, and product grade 80 wt.%. This final study demonstrated the remarkable separation performance that can be achieved, and the fact that in the presence of larger cenospheres high recoveries and upgrades are possible at even higher solids throughputs. The work was also consistent with the earlier findings which show the benefit of a higher cenosphere feed concentration in promoting the bulk streaming phenomenon. This study has investigated for the first time an entirely new technology for separating very low grade buoyant particles from a very high concentration of ultrafine high density particles. The approach is effectively an inverted application of the REFLUX™ Classifier. This thesis has therefore incorporated the analysis developed for the REFLUX™ Classifier, providing a clear basis for assessing this new, inverted, system. Through this approach it has been possible to infer the existence of hydrodynamic benefits that arise from operating at higher concentrations, and in turn elevated solids processing rates. Further investigation of the bulk streaming phenomenon within inclined systems is recommended in order to identify the precise onset of the phenomenon. This benefit has not previously been identified in the separation of cenospheres from fly ash. The overall findings from this study demonstrate a separation performance significantly better than achieved previously by any other technology to date.
Частини книг з теми "Fly Ash Cenosphere"
Beddu, Salmia, Mahyun Mohd Zainoodin, Zakaria Che Muda, Daud Mohamad, Fadzli Mohamed Nazri, Zarina Itam, and Siti Nabihah Sadon. "Characteristic Study on Malaysia Power Plant Fly Ash Cenosphere." In Proceedings of AICCE'19, 1229–37. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32816-0_94.
Повний текст джерелаBora, Pritom J., K. J. Vinoy, Kishore, Praveen C. Ramamurthy, and Giridhar Madras. "Lightweight Microwave Absorber from Industrial Waste Fly Ash Cenosphere." In Lecture Notes in Electrical Engineering, 459–66. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4286-7_45.
Повний текст джерелаShende, Diwakar Z., Kailas L. Wasewar, and Shraddha S. Wadatkar. "Target-Specific Applications of Fly Ash Cenosphere as Smart Material." In Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, 3349–69. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-36268-3_207.
Повний текст джерелаShende, Diwakar Z., Kailas L. Wasewar, and Shraddha S. Wadatkar. "Target-Specific Applications of Fly Ash Cenosphere as Smart Material." In Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, 1–22. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-11155-7_207-1.
Повний текст джерелаPatel, S. K., and A. N. Nayak. "Study on Specific Compressive Strength of Concrete with Fly Ash Cenosphere." In Recent Developments in Sustainable Infrastructure, 561–72. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4577-1_47.
Повний текст джерелаYang, Lei, Zhiwei Peng, Yawen Huang, Liancheng Wang, Leixia Zheng, Mingjun Rao, Guanghui Li, and Tao Jiang. "Preparation of Thermal Insulation Materials from Ferronickel Slag with Addition of Fly Ash Cenosphere." In The Minerals, Metals & Materials Series, 217–26. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36628-5_20.
Повний текст джерелаZhu, Guangyan, Zhiwei Peng, Lei Yang, Wenxing Shang, and Mingjun Rao. "Microstructural Evolution of Thermal Insulation Materials Prepared by Sintering of Ferronickel Slag and Fly Ash Cenosphere." In The Minerals, Metals & Materials Series, 143–49. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92388-4_14.
Повний текст джерелаFang, Xiaolei, Zhiwei Peng, Lei Yang, Guangyan Zhu, and Mingjun Rao. "Conversion of Ferronickel Slag to Thermal Insulation Materials by Microwave Sintering: Effect of Fly Ash Cenosphere Addition." In The Minerals, Metals & Materials Series, 219–28. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-22576-5_20.
Повний текст джерелаVinu Kumar, S. M., K. L. Senthil kumar, and B. Suresha. "Effect of Ultraviolet (UV) Radiation on Mechanical Behavior of Bi-directional Carbon Fabric Reinforced Epoxy Composites Impregnated with Fly Ash Cenosphere Particles." In Springer Proceedings in Materials, 1–9. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8319-3_1.
Повний текст джерелаHung, L. V., N. V. Tuan, and L. T. Thanh. "Experimental Investigation of High-Strength Lightweight Concrete Using Fly Ash Cenospheres." In Lecture Notes in Civil Engineering, 637–45. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7160-9_64.
Повний текст джерелаТези доповідей конференцій з теми "Fly Ash Cenosphere"
"Utilization of Cenosphere in Manufacturing of Fly Ash Brick." In Recent Advancements in Geotechnical Engineering. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901618-13.
Повний текст джерелаChe, Ru-Xin, and Ying-Juan Ni. "Preparation and microwave absorption property of the core-nanoshell composite absorbers with magnetic fly-ash hollow cenosphere as nuclear." In Second International Conference on Smart Materials and Nanotechnology in Engineering, edited by Jinsong Leng, Anand K. Asundi, and Wolfgang Ecke. SPIE, 2009. http://dx.doi.org/10.1117/12.837464.
Повний текст джерелаBora, Pritom J., Bibhusita Mahanta, Kishore K, and Praveen C. Ramamurthy. "Design of Bi-Layered Strong Microwave Absorber Based on Polymer-Fly Ash Cenosphere Composite With A Data-Driven Approach." In 2022 IEEE International Conference on Emerging Electronics (ICEE). IEEE, 2022. http://dx.doi.org/10.1109/icee56203.2022.10117614.
Повний текст джерелаUkoba, Kingsley, Samuel Popoola, Olatunde Israel, Patrick Imoisili, and Tien-Chien Jen. "Development and Characterization of Fly Ash Nanoparticles Reinforced Epoxy Resin Composite for Acoustic Applications." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23708.
Повний текст джерелаFan, GuoLi, RongYu Si, and Ming Yuan. "The effect of particles integrity on the damping capacities of fly-ash cenospheres/AZ91D composites." In 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/mmeceb-15.2016.101.
Повний текст джерела