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Littérature scientifique sur le sujet « Organic zeolites »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Organic zeolites"

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Nursanti, Ida, et Nida Kemala. « Peranan Zeolit dalam Peningkatan Kesuburan Tanah Pasca Penambangan ». Jurnal Media Pertanian 4, no 2 (11 novembre 2019) : 88. http://dx.doi.org/10.33087/jagro.v4i2.84.

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ABSTRACTPost-mining soils have poor chemical and physical properties and have very low fertility rates. The study aims to determine the best dose of zeolite in order to improve soil fertility after mining as a planting medium. The experiment was carried out experimentally by giving zeolites (Z) and 3 treatment levels, namely: Z0 = without zeolites, Z1 = zeolites 100 g, Z2 = zeolites 200 g. There were 3 replications, so 9 unit experiments were obtained. The final analysis of research on soil chemistry consists of; Available P, total N, K-exs, C-organic and CEC, pH. Data analysis of the diversity of characteristics of post-mining soil types is presented in tabular form and discussed descriptively. Provision of 200 grams zeolite of 10 kg post-mining land (equivalent to 20 tons Ha-1 of zeolite ) and incubated for eight weeks can increase soil pH, total N, K-dd, available P andCECsoil. Keywords: Zeolites and post-mining soils ABSTRAKTanah pasca penambangan memiliki sifat kimia dan fisik yang kurang baik serta memiliki tingkat kesuburan yang sangat rendah. Penelitian bertujuan mengetahui menentukan dosis zeolit terbaik agar dapat memperbaiki kesuburan tanah pasca penambangan terkait sebagai media tanam. Percobaan dilakukan secara eksperimen dengan pemberian zeolit (Z) dan 3 taraf perlakuan yaitu :Z0= tanpa zeolit, Z1 = zeolit 100 g, Z2 = zeolit 200 g. Terdapat 3 ulangan, sehingga diperoleh 9 unit percobaan. Analisis akhir penelitian terhadap kimia tanah terdiri dari; P tersedia, N total, K-dd, C-organik dan KTK, pH. Analisis data keragaman karakteristik jenis tanah pasca penambangan disajikan dalam bentuk tabel dan dibahas secara deskriptif. Pemberian zeolit 200 gram per 10 kg tanah pasca tambang (setara 20 ton zeolit per Ha) dan diinkubasi selama delapan minggu dapat meningkatkan pH tanah, N-total, K-dd, P tersedia dan KTK tanah. Kata kunci : Zeolit dan tanah pasca penambangan.
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Asgar Pour, Zahra, et Khaled O. Sebakhy. « A Review on the Effects of Organic Structure-Directing Agents on the Hydrothermal Synthesis and Physicochemical Properties of Zeolites ». Chemistry 4, no 2 (13 mai 2022) : 431–46. http://dx.doi.org/10.3390/chemistry4020032.

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The study on the synthesis of zeolites, including both the development of novel techniques of synthesis and the discovery of new zeolitic frameworks, has a background of several decades. In this context, the application of organic structure-directing agents (SDAs) is one of the key factors having an important role in the formation of porous zeolitic networks as well as the crystallization process of zeolites. There are various elements that are needed to be explored for elucidating the effects of organic SDAs on the final physicochemical properties of zeolites. Although SDAs were firstly used as pore generators in the synthesis of high-silica zeolites, further studies proved their multiple roles during the synthesis of zeolites, such as their influences on the crystallization evolution of zeolite, the size of the crystal and the chemical composition, which is beyond their porogen properties. The aim of this mini review is to present and briefly summarize these features as well as the advances in the synthesis of new SDAs during the last decades.
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Qiu, Liyan, Patricia A. Laws, Bi-Zeng Zhan et Mary Anne White. « Thermodynamic investigations of zeolites NaX and NaY ». Canadian Journal of Chemistry 84, no 2 (1 février 2006) : 134–39. http://dx.doi.org/10.1139/v05-244.

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Understanding of the thermodynamic stability of zeolites is important in the prediction of thermodynamic equilibrium. Therefore, we have undertaken an investigation of the thermodynamic stability of the zeolites NaX and NaY through heat capacity measurements from ca. 30 to 300 K. No phase transitions were observed, and zeolite NaX does not show a significant particle size effect when the particle size is reduced to ca. 30 nm. The results show that the specific heat capacity increases with the Al content in the zeolite. Both NaX and NaY are found to be thermodynamically stable with respect to their elements because of enthalpic stabilization and with slight entropic destabilization. These data are used along with literature data for many other zeolitic materials to show that the thermodynamic stability of zeolites is enhanced with increasing aluminum content. Key words: zeolite, heat capacity, thermodynamic stability, nano effects.
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Gackowski, Mariusz, Jerzy Podobiński, Ewa Broclawik et Jerzy Datka. « IR and NMR Studies of the Status of Al and Acid Sites in Desilicated Zeolite Y ». Molecules 25, no 1 (20 décembre 2019) : 31. http://dx.doi.org/10.3390/molecules25010031.

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The desilication of zeolite Y (of Si/Al = 31) that was previously dealuminated by steaming and acid treatment was studied. Desilication of zeolites of high Si/Al module in alkali solutions extracts both Si and Al from zeolite crystals, but while Si remains in solution, Al is reinserted into the zeolite grain. The main goal of our study was to follow the status of Al reinserted into zeolite during the desilication procedure, and its role in the formation of acid sites of the Brønsted and Lewis types. The properties of Al were followed by 27Al MAS NMR spectroscopy (for parent samples and zeolites treated either with NaOH or NaOH/tetrabutylammonium hydroxide), whereas the acid sites generated in the final stages were studied by IR spectroscopy with NH3 and CO as probe molecules. In non-desilicated zeolite, most of the Al was in a typically zeolitic tetrahedral coordination, while both NMR and quantitative IR studies of NH3 sorption evidenced that Al that was extracted by desilication and was subsequently reinserted had a tetrahedral coordination similar to amorphous aluminosilicates and showed an ion exchange ability. After the exchange of Na+ to NH4+ and decomposition of NH4+ ions, reinserted Al forms generated protonic sites from which some condensed at higher temperatures producing Lewis acid sites (with stoichiometry typical for zeolites i.e., the condensation of two protonic sites produces one Lewis site) but some other kept their character.
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Erofeev, Vladimir I., Sofiya N. Dzhalilova, Mikhail V. Erofeev, Vasilii S. Ripenko et Vladimir P. Reschetilowski. « Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma ». Molecules 25, no 11 (11 juin 2020) : 2704. http://dx.doi.org/10.3390/molecules25112704.

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The effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presence of an ‘X-oil’ organic structure-forming additive. The modification of the zeolite with zinc was carried out by impregnating the zeolite granules in the H-form with an aqueous solution of Zn(NO3)2. The obtained zeolites were characterized by X-ray phase analysis and IR spectroscopy. It is shown that the synthesized zeolites belong to the high-silica MFI zeolites. The study of microporous zeolite-containing catalysts during the conversion of C3-C4 alkanes to aromatic hydrocarbons made it possible to establish that the highest yield of aromatic hydrocarbons is observed on zeolite catalysts modified with 1 and 3% ZnO and amount to 63.7 and 64.4% at 600 °C, respectively, which is 7.7–8.4% more than on the original zeolite. The preliminary activation of microporous zeolites modified with 1–5% ZnO and plasma leads to an increase in the yield of aromatic hydrocarbons from the propane–butane fraction; the maximum yield of arenes is observed in zeolite catalysts modified with 1 and 3% ZnO and activated by plasma, amounting to 64.9 and 65.5% at 600 °C, respectively, which is 8.9–9.5% more than on the initial zeolite. The activity of the zeolite catalysts modified by ZnO and activated by plasma show good agreement with their acid properties. Activation of the zeolites modified by 1 and 3% ZnO and plasma leads to an increase in the concentration of the weak acid sites of the catalyst to 707 and 764 mmol/g in comparison with plasma-inactivated 1 and 3% ZnO/ZKE-XM catalysts at 626 and 572 mmol/g, respectively.
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Asefa, Misikir Tamiru, et Gebisa Bekele Feyisa. « Comparative Investigation on Two Synthesizing Methods of Zeolites for Removal of Methylene Blue from Aqueous Solution ». International Journal of Chemical Engineering 2022 (12 février 2022) : 1–12. http://dx.doi.org/10.1155/2022/9378712.

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Organic dyes discharged from industries have significant effect on ecosystem and health of human being because of their toxicity and appearing colour in the wastewater. Absorption method is a more preferable method than other wastewater treatment methods due to its characteristics of being eco-friendly, simple, and efficient. Zeolites are among the porous materials often used as absorbent of organic dye from wastewater. However, wide use of zeolite has been limited due to its expensive precursors and synthesized methods (i.e., hydrothermal method which needs expensive autoclave). In this work, cheap and widely available precursors aluminum from waste food packaging aluminum foil and low cost silica from sugar cane bagasse ash were used to synthesized zeolite without hydrothermal method (Z-B), where hydrothermally synthesized zeolite (Z-A) was used as a reference. The XRD patterns revealed that Z-B was sodalite octahydrate zeolite and Z-A was zeolite Linde Type A (LTA). The morphology and type of bond in both zeolites were investigated by SEM and FTIR. The synthesized zeolites were used as absorbents for absorbing methylene blue (MB) from aqueous solutions. The MB removal efficiency of the synthesized zeolites was evaluated by using UV-Visible spectroscopy. The results indicate that the absorption capacities of Z-B and Z-A were 3.5 mg/g and 3.9 mg/g at 40 mg/L, respectively. Optimum removal efficiencies of both zeolites were observed at PH of 7 and adsorbent dosage of 0.005 mg/L. The stabilities of both zeolites were tested three times. The absorption isotherms of sodalite octahydrate zeolite and zeolite LTA were effectively fitted with the Freundlich and Langmuir modes. Moreover, the absorption kinetics of both zeolites follow pseudo-second-order kinetics. Therefore, nonhydrothermally synthesized zeolite is alternative absorbent for dye removal due to its safety, cheap cost, using low cost and widely available precursors, and using easy and safe synthesizing method.
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Behin, Jamshid, Elmira Ghadamnan et Hossein Kazemian. « Recent advances in the science and technology of natural zeolites in Iran ». Clay Minerals 54, no 2 (24 mai 2019) : 131–44. http://dx.doi.org/10.1180/clm.2019.19.

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AbstractIran has significant deposits of high-purity natural zeolites. Many Iranian scholars conduct scientific research on porous materials, from natural and synthetic zeolites to metal organic framework materials. Iranian zeolite deposits and associated research are reviewed here. Various industrial applications of natural zeolites, from agriculture to animal husbandry to the construction industry and beyond are discussed here.
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Cadar, Oana, Marin Senila, Maria-Alexandra Hoaghia, Daniela Scurtu, Ion Miu et Erika Andrea Levei. « Effects of Thermal Treatment on Natural Clinoptilolite-Rich Zeolite Behavior in Simulated Biological Fluids ». Molecules 25, no 11 (31 mai 2020) : 2570. http://dx.doi.org/10.3390/molecules25112570.

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This study presents the effect of thermal treatment (450, 500, 600, 750, and 800 °C) on a Romanian clinoptilolite-rich natural zeolite, along with the interaction of raw and thermally treated zeolites with simulated gastric fluid (SGF, pH = 1.20) at different zeolite to SGF ratios and exposure times. The zeolites were characterized using gravimetric analysis, X-ray fluorescence, powder X-ray diffraction (pXRD), and Fourier transform infrared (FT-IR) spectroscopy. The chemical composition of the zeolite subjected to thermal treatment did not change significantly with the increase of temperature. Structural changes were not detectable by pXRD and FT-IR analyses in the zeolites thermally treated up to 500 °C, while above 600 °C a gradual structural breakdown of zeolite was noticed. At high temperatures, the broad, low-intensity peaks in pXRD patterns indicated the partial amorphization of the crystalline structure. The pXRD and FT-IR analyses showed that the crystalline structure of zeolites remains unaffected after their exposure to SGF. The results revealed that the amounts of Fe, Na, Mg, K, Ca, Al, and Si released depends mainly on the zeolite to SGF ratio, and to a lower extent on the thermal treatment temperature, while the exposure time of 1 to 7 days does not have a significant impact on the elements released in SGF.
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Gackowski, Mariusz, et Jerzy Datka. « Acid Properties of Hierarchical Zeolites Y ». Molecules 25, no 5 (26 février 2020) : 1044. http://dx.doi.org/10.3390/molecules25051044.

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The article reviews different strategies towards obtaining mesoporous zeolites Y: desilication; surfactant templating and assembly of zeolite crystals. The impact of those methods on physicochemical properties is covered, with a special focus on the acidity of the samples measured with infrared (IR) spectroscopy. The methods of characterization of acidity are presented. Quaternary ammonium cations used for desilication lead to obtaining crystalline; mesoporous and highly acidic zeolites. Si-OH-Al groups of extremely high acidity can be produced by calcination in a humid atmosphere. When the conditions are optimized, post-synthetic surfactant templating allows crystalline mesoporous zeolite to be obtained with no loss of material. All mesoporous zeolites Y proved to be active catalysts in liquid phase isomerization, catalytic cracking, and other reactions.
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Azizi, Seyed Naser, Akram Alavi Daghigh et Maryam Abrishamkar. « Phase Transformation of Zeolite P to Y and Analcime Zeolites due to Changing the Time and Temperature ». Journal of Spectroscopy 2013 (2013) : 1–5. http://dx.doi.org/10.1155/2013/428216.

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In the present study, the synthesis of template free zeolite P under hydrothermal condition was investigated. The effects of parameters such as Si/Al ratios (3–45), crystallization temperatures (80–160°C), and cry (40–60 h) on the synthesis of zeolite P were studied. The phase transformation of zeolite P to two types of high crystallinity Y and analcime zeolites due to change of temperature was observed. The effect of temperature on the achievement of two different zeolite types (Y and analcime) with a constant initial synthetic composition under organic free synthesis of zeolite P was studied. The zeolitic products were characterized by X-ray diffraction, scanning electron microscopy, and IR spectroscopy techniques.
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Thèses sur le sujet "Organic zeolites"

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Wright, P. A. « The structure of zeolites and the zeolite-sorbate complex ». Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372290.

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Simancas, Coloma Jorge. « Synthesis and Characterization of Zeolitic Materials Using Phosphorous Organic Structure Directing Agents ». Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/171267.

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[ES] Las zeolitas son materiales cristalinos microporosos con canales y tamaños de poro de dimensiones moleculares. La estructura y composición de las zeolitas les confiere interesantes propiedades que permiten su aplicación en una amplia gama de aplicaciones industriales como adsorción, separación o catálisis. La síntesis de zeolitas es la etapa más importante para el control de la estructura y composición de las zeolitas y, por tanto, crítica para la optimización de sus propiedades. Esta tesis se ha centrado en la síntesis de zeolitas utilizando compuestos que contienen fósforo (cationes fosfonio y aminofosfonio) como Agentes Directores de Estructura (P-ADE). El uso de compuestos fosforados influye en la cristalización y propiedades de las zeolitas obtenidas en comparación con las zeolitas obtenidas con cationes de amonio clásicos. Los compuestos fosforados se eligieron debido a su diferente química y estabilidad con respecto a los cationes de amonio clásicos comúnmente usados en la síntesis de zeolitas. Estos aspectos se estudiaron con un estudio comparativo de diferentes cationes de amonio y fosforados. Los compuestos de fósforo utilizados en este trabajo han dado lugar a nuevas estructuras cristalinas (ITQ-58 e ITQ-66) y han abierto nuevas vías de síntesis de zeolitas ya conocidas (RTH, IWV y DON), ampliando su gama de composiciones químicas. La descomposición térmica de los P-ADE confinados dentro de las zeolitas da lugar a la formación de especies de fósforo extra-red que permanecen dentro de los canales y cavidades de las zeolitas. Estas especies modulan las propiedades ácidas y de adsorción de los materiales finales dependiendo de los tratamientos post-síntesis. En este trabajo se ha estudiado una ruta para la incorporación de cantidades controladas de fósforo durante la etapa de síntesis. Esto ha permitido controlar la adsorción y las propiedades ácidas en las zeolitas de poro pequeño, lo que no se puede lograr mediante metodologías de post-síntesis.
[CA] Les zeolites són materials cristal·lins microporosos amb canals i mides de porus de dimensions moleculars. L'estructura i composició de les zeolites els confereix interessants propietats que permeten la seua aplicació en una àmplia gamma d'aplicacions industrials com adsorció, separació o catàlisi. La síntesi de zeolites és l'etapa més important per al control de l'estructura i composició de les zeolites i, per tant, crítica per a l'optimització de les seues propietats. Aquesta tesi s'ha centrat en la síntesi de zeolites utilitzant compostos que contenen fòsfor (cations fosfoni i aminofosfoni) com a agents directors d'estructura (P-ADE). L'ús de compostos fosforats influeix en la cristal·lització i propietats de les zeolites obtingudes en comparació amb les zeolites obtingudes amb cations d'amoni clàssics. Els compostos fosforats es van triar a causa de la seua diferent química i estabilitat pel que fa als cations d'amoni clàssics utilitzats en la síntesi de zeolites. Aquests aspectes s¿estudiaren amb un estudi comparatiu de diferents cations d'amoni i fosforats. Els compostos de fòsfor utilitzats en aquest treball han donat lloc a noves estructures cristal·lines (ITQ-58 i ITQ-66) i han obert noves vies de síntesi de zeolites ja conegudes (RTH, IWV i DO), ampliant la seua gamma de composicions químiques. La descomposició tèrmica dels P-ADE atrapats dins de les zeolites dona lloc a la for-mació d'espècies de fòsfor extra-xarxa que romanen dins dels canals i cavitats de les zeolites. Aquestes espècies modulen les propietats àcides i d'adsorció dels materials finals depenent dels tractaments post-síntesi. En aquest treball s'ha estudiat una ruta per la incorporació de quantitats controlades de fòsfor durant l'etapa de síntesi. Això ha permés controlar l'adsorció i les propietats àcides en les zeolites de porus petit, el que no es pot aconseguir mitjançant metodologies de post-síntesi.
[EN] Zeolites are microporous crystalline materials with channels and pore openings of molecular dimensions. The structure and composition of zeolites confers them interesting properties that allow their application in a wide range of industrial applications as adsorption, separation or catalysis. The synthesis of zeolites is the most important stage to control the structure and composition of zeolites, and thus, critical to optimize their properties. This thesis has been focused on the synthesis of zeolites using phosphorous containing compounds (phosphonium and aminophosphonium cations) as Organic Structure Directing Agents (P-OSDA). The use of these phosphorous compounds influence the crystallization and properties of the obtained zeolites compared to zeolites obtained with classical ammo-nium cations. Phosphorous compounds were chosen because of their different chemistry and stabil-ity properties respect to classical ammonium cations commonly used in the synthesis of zeo-lites. These aspects were studied in a comparative study with different ammonium and phosphorous cations. The phosphorous compounds used in this work have yielded new crystalline structures (ITQ-58 and ITQ-66) and opened new routes for the synthesis of already known zeolites (RTH, IWV and DON), widening their chemical composition range. The thermal decomposition of the P-OSDAs entrapped inside the zeolites yields to the formation of extra-framework phosphorus species that remain inside the channels and voids of the zeolites. These species modulate the adsorption and acid properties of the final materials depending on the post-synthesis treatments. In this work, a route for the incorporation of controlled amounts of phosphorus during the synthesis stage has been studied. This has allowed to control the adsorption and acid properties in small pores zeolites, which cannot be achieved by post-synthesis methodologies.
I wish to firstly acknowledge the Spanish Government for the necessary funding for the FPI pre-doctoral fellowship (BES-2013-062999). Also, this thesis would not have been possible without the infrastructures provided by the UPV and the CSIC staff, fused into the ITQ. Furthermore, I want to acknowledge the Microscopy Service of the UPV for their support in sample microscopy characterization
Simancas Coloma, J. (2021). Synthesis and Characterization of Zeolitic Materials Using Phosphorous Organic Structure Directing Agents [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/171267
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Kibby, Sarah A. M. « Applications of zeolites to organic synthesis ». Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/10989.

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The application of zoelites as catalysts for a number of organic, liquid-phase, acid-promoted reactions is discussed with reference to zeolite acidity and structure on product yield and selectivity. The zeolites described are predominantly high silica materials including Nu-2, ZSM-5, Nu-10 and EU-1 structures. Examination of the Claisen rearrangement of allyl phenyl ether has shown that it is promoted by zeolites relative to the thermal reaction and that the extent of conversion increases with zeolite acidity. In addition to the expected products, 2-allylphenol and the cyclic 2-methyldihydrobenzofuran, small quantities of the para-product, 4-allylphenol are detected over H-Nu-2 and (Cu(II),H)-Y zeolites. 4-Allylphenol is not detected in the thermal rearrangement and its formation in the present work is attributed to an intermolecular mechanism via ether cleavage. Also examined is the Fries rearrangement of phenyl acetate and phenyl benzoate. The product selectivity is compared with that over Nafion-H, an acidic, non-porous, perfluorinated ion-exchange resin. Both rearrangements are more para-selective when performed in the presence of zeolites. In the rearrangement of phenyl acetate a number of by-products in addition to the expected 2- and 4-hydroxyacetophenones are observed. The aldol self-condensation of acetophenone to yield β-methylchalcone and of acetophenone and benzaldehyde to yield chalcone is promoted by H-Nu-2 zeolite. The ring closure of 2-benzoylbenzoic acid to anthraquinone takes place quantitatively over H-Nu-2. The cyclisation is monitored by i.r. to completion and the product isolated by extraction or sublimation. Of those zeolites examined, H-Nu-2 is likely to be most widely applicable as a catalyst in organic synthesis because of its relatively large pore dimensions, high silica content (thermal stability) and high acidity.
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Laidlaw, Paul. « Catalysis of organic reactions by cation-exchanged zeolites ». Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366734.

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Langham, Christopher. « Heterogeneous enantioselective azirdination of alkenes using zeolites ». Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266046.

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Martin, K. « The catalysis of organic reactions by clays and zeolites ». Thesis, Aberystwyth University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381778.

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Nearchou, Antony. « Zeolites fit for a crown ». Thesis, University of Bath, 2019. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767594.

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Annamalai, Perushini. « Electrospinning of porous composite materials for hydrogen storage application ». University of the Western Cape, 2016. http://hdl.handle.net/11394/5654.

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>Magister Scientiae - MSc
Due to the rapid depletion of fossil fuel reserves and the production of environmentally harmful by-products such as carbon dioxide, there is an urgent need for alternate sustainable clean energy. One of the leading candidates in this endeavour is hydrogen, which can be used as an energy carrier since it has a high energy density, zero emissions and is produced from non-depletable resources such as water. The major challenge hindering a hydrogen economy is the lack of safe and effective storage technologies for mobile applications. A prospective solution to this problem lies in the use of porous powdered materials, which adsorb the hydrogen gas. However, the integration of these powdered materials into a storage tank system, results in the pipelines being contaminated during filling cycles. This necessitates the shaping of the porous powdered materials. Among the many shaping techniques available, the electrospinning technique has been proposed as a promising technology since it is a versatile process that is easily scaled-up making it attractive for the applications of the study. Furthermore, the electrospinning process enables the synthesis of nano-sized fibres with attractive hydrogen sorption characteristics. In this regard, the current study employs the electrospinning technique to synthesise electrospun composite fibres for mobile hydrogen storage applications. After electrospinning three polymers, polyacrylonitrile (PAN) was selected as the most suitable polymer because it yielded bead-free electrospun fibres. However, the diameter of the PAN fibres was large/thick which prompted further optimisation of the electrospinning parameters. The optimised electrospinning conditions that yield unbeaded fibres within the desired diameter range (of 300-500 nm) were a PAN concentration of 10 wt%, a flow rate of 0.4 mL/h, a distance of 10 cm between the needle tip and collector plate, and an applied voltage of 8 kV. The study then progressed to the synthesis and characterisation of the pristine porous powdered materials which adsorb hydrogen gas. The porous powdered materials investigated were commercial zeolite 13X, its synthesised templated carbon derivative (ZTC) and Zr (UiO-66) and Cr (MIL-101) based metal-organic frameworks (MOFs). ZTC was synthesised via liquid impregnation coupled with chemical vapour deposition (CVD), and the MOFs were synthesised by the modulated solvothermal method. Analysis of the ZTCs morphology and phase crystallinity show that the carbon templated process using zeolites was successful, however, ZTC was amorphous compared to crystalline zeolite template. The BET surface area was assessed with the aid of nitrogen sorption isotherms for both zeolite 13X and ZTC, and values of 730 and 2717 m²/g, respectively were obtained. The hydrogen adsorption capacity for zeolite 13X was 1.6 wt% and increased to 2.4 wt% in the ZTC material at 77 K and 1 bar. The successful synthesis of well defined, crystalline MOFs was evident from X-ray diffraction and morphological analysis. The BET surface area and hydrogen adsorption for Zr MOF were 1186 m²/g and 1.5 wt%, respectively at 77 K and 1 bar. Cr MOF had a BET surface area of 2618 m²/g and hydrogen adsorption capacity of 1.9 wt% at 77 K and 1 bar. The main focus of the study was to synthesise electrospun composite fibres that can adsorb hydrogen gas and thus provide significant insight in this field of research. As such it examined composite fibres that incorporates porous powdered materials such as zeolite 13X, ZTCs, UiO-66 (Zr) MOF and MIL-101 (Cr) MOF and investigated their ability to adsorb hydrogen gas, which have not been reported previously. The synthesis of composite fibres was achieved by incorporating the porous powdered materials into the PAN resulting in a polymeric blend that was then electrospun. Morphological analysis illustrated that the porous powdered materials were successfully supported by or incorporated within the PAN fibres, forming composite fibres. The BET surface area of the 40 wt% zeolite-PAN and 12.5 wt% ZTC-PAN composite fibres were 440 and 1787 m²/g respectively. Zr MOF and Cr MOF composite fibres had a BET surface area of 815 and 1134 m²/g, respectively. The BET surface area had reduced by 40, 34, 31 and 57% for zeolite 13X, ZTC, Zr MOF and Cr MOF, respectively after these porous powdered materials were incorporated into PAN. The hydrogen adoption capacity for 40 wt% zeolite-PAN, 12.5 wt% ZTC-PAN, 20 wt% Zr MOFPAN and 20 wt% Cr MOF-PAN composite fibres was 0.8, 1.8, 0.9 and 1.1 wt%, respectively. This decrease was attributed to the limited amount of porous powdered materials that could be incorporated into the fibres since only 40 wt% of zeolite 13X, 12.5 wt% of ZTC and 20 wt% of the MOFs were loaded into their respective composite fibres. This was due to the fact that incorporation of greater amounts of porous powdered materials resulted in a viscous polymeric blend that was unable to be electrospun. It is evident from the study that electrospinning is a versatile process that is able to produce composite fibres with promising properties that can potentially advance the research in this field thus providing a practical solution to the problem of integrating loose powdered materials into an on-board hydrogen storage system.
CSIR Young Researchers Establishment Fund (YREF)
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Qiu, Liyan. « Thermal properties of framework materials, selected zeolites, clathrates and an organic diol ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0035/NQ66643.pdf.

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Kassaee, Mohamad Hadi. « Internal surface modification of zeolite MFI particles and membranes for gas separation ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44906.

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Zeolites are a well-known class of crystalline oxide materials with tunable compositions and nanoporous structures, and have been used extensively in catalysis, adsorption, and ion exchange. The zeolite MFI is one of the well-studied zeolites because it has a pore size and structure suitable for separation or chemical conversion of many industrially important molecules. Modification of zeolite structures with organic groups offers a potential new way to change their properties of zeolites, beyond the manipulation of the zeolite framework structure and composition. The main goals of this thesis research are to study the organic-modification of the MFI pore structure, and to assess the effects of such modification on the adsorption and transport properties of zeolite MFI sorbents and membranes. In this work, the internal pore structure of MFI zeolite particles and membranes has been modified by direct covalent condensation or chemical complexation of different organic molecules with the silanol defect sites existing in the MFI structure. The organic molecules used for pore modification are 1-butanol, 1-hexanol, 3-amino-1-propanol, 1-propaneamine, 1,3-diaminopropane, 2-[(2-aminoethyl)amino]ethanol, and benzenemethanol. TGA/DSC and 13C/29Si NMR characterizations indicated that the functional groups were chemically bound to the zeolite framework, and that the loading was commensurate with the concentration of internal silanol defects. Gas adsorption isotherms of CO2, CH4, and N2 on the modified zeolite materials show a range of properties different from that of the bare MFI zeolite. The MFI/3-amino-1-propanol, MFI/2-[(2-aminoethyl)amino]ethanol, and MFI/benzenemethanol materials showed the largest differences from bare MFI. These properties were qualitatively explained by the known affinity of amino- and hydroxyl groups for CO2, and of the phenyl group for CH4. The combined influence of adsorption and diffusion changes due to modification can be studied by measuring permeation of different gases on modified MFI membranes. To study these effects, I synthesized MFI membranes with [h0h] out-of-plane orientation on α-alumina supports. The membranes were modified by the same procedures as used for MFI particles and with 1-butanol, 3-amino-1-propanol, 2-[(2-aminoethyl)amino]ethanol, and benzenemethanol. The existence of functional groups in the pores of the zeolite was confirmed by PA-FTIR measurements. Permeation measurements of H2, N2, CO2, CH4, and SF6, were performed at room temperature before and after modification. Permeation of n-butane, and i-butane were measured before and after modification with 1-butanol. For all of the studied gases, gas permeances decreased by 1-2 orders of magnitude compared to bare MFI membranes for modified membranes. This is a strong indication that the organic species in the MFI framework are interacting with or blocking the gas molecule transport through the MFI pores. A detailed fundamental study of the CO2 adsorption mechanism in modified zeolites is necessary to gain a better understating of the adsorption and permeation behavior of such materials. Towards this end, an in situ FTIR study was performe.For the organic molecules with only one functional group (1-butanol, benzenemethanol, and 1-propaneamine), physical adsorption was found - as intuitively expected - to be the only observed mode of attachment of CO2 to the modified zeolite material. Even in the case of MFI modified with 1,3-diaminopropane, only physical adsorption is seen. This is explained by the isolated nature of the amine groups in the material, due to which only a single amine group can interact with a CO2 molecule. On the other hand, chemisorbed CO2 species are clearly observed on bare MFI, and on MFI modified with 3-amino-1-propanol or 2-[(2-aminoethyl)amino]ethanol. Specifically, these are carbonate-like species that arise from the chemisorption of CO2 to the silanol group in bare MFI and the alcohol groups of the modifying molecule. The possibility of significant contributions from external surface silanol groups in adsorbing CO2 chemisorbed species was ruled out by a comparative examination of the FTIR spectra of 10 μm and 900 nm MFI particles modified with 2-[(2-aminoethyl)amino]ethanol.
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Livres sur le sujet "Organic zeolites"

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Blay, Vincent, Luis Francisco Bobadilla et Alejandro Cabrera, dir. Zeolites and Metal-Organic Frameworks. NL Amsterdam : Amsterdam University Press, 2018. http://dx.doi.org/10.5117/9789462985568.

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Zeolites are natural or synthetic materials with porous chemical structures that are valuable due to their absorptive and catalytic qualities. Metal-Organic Frameworks (MOFs) are manmade organometallic polymers with similar porous structures. This introductory book, with contributions from top-class researchers from all around the world, examines these materials and explains the different synthetic routes available to prepare zeolites and MOFs. The book also highlights how the substances are similar yet different and how they are used by science and industry in situations ranging from fueling cars to producing drugs.
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Weitkamp, Jens. Catalysis and Zeolites : Fundamentals and Applications. Berlin, Heidelberg : Springer Berlin Heidelberg, 1999.

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Williams, Craig Denver. Uptake and release studies of simple organic molecules in synthetic zeolites. Salford : University of Salford, 1985.

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4

1947-, Urabe Kazuo, et Onaka Makoto 1952-, dir. Zeolite, clay, and heteropoly acid in organic reactions. Tokyo : Kodansha, 1992.

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Ulʹi︠a︡nova, O. A. Ėkologicheskai︠a︡ ot︠s︡enka primenenii︠a︡ korot︠s︡eolitovogo substrata. Krasnoi︠a︡rsk : Krasnoi︠a︡rskiĭ gos. agrarnyĭ universitet, 2004.

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S, Prakash Deepak, et United States. Environmental Protection Agency, dir. Sorption and catalytic destruction of chlorinated VOCs using fresh and dealuminated Y and ZSM-5 zeolites. [Washington, D.C. ? : U.S. Environmental Protection Agency, 1996.

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Chunshan, Song, Garcés Juan M et Sugi Yoshihiro, dir. Shape-selective catalysis : Chemicals synthesis and hydrocarbon processing. Washington, D.C : American Chemical Society, 2000.

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Naonobu, Katada, Okumura Kazu et SpringerLink (Online service), dir. Characterization and Design of Zeolite Catalysts : Solid Acidity, Shape Selectivity and Loading Properties. Berlin, Heidelberg : Springer-Verlag Berlin Heidelberg, 2010.

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Majid, Nazia. Approaches to the synthesis of an organic zeolite. Manchester : University of Manchester, 1994.

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Derouane, Eric G. Zeolite Microporous Solids : Synthesis, Structure, and Reactivity. Dordrecht : Springer Netherlands, 1992.

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Chapitres de livres sur le sujet "Organic zeolites"

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Souto, Eliana B., Patrícia Severino, Patrícia Hissae Yassue-Cordeiro, Romilda Fernandez Felisbino, Eliezer Ladeia Gomes et Classius Ferreira da Silva. « Organic/Zeolites Nanocomposite Membranes ». Dans Organic-Inorganic Composite Polymer Electrolyte Membranes, 73–98. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52739-0_4.

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Espeel, Patrick, Rudy Parton, Helge Toufar, Johan Martens, Wolfgang Hölderich et Pierre Jacobs. « Zeolite Effects in Organic Catalysis ». Dans Catalysis and Zeolites, 377–436. Berlin, Heidelberg : Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-03764-5_6.

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Yamamoto, K., et T. Tatsumi. « Organic-Inorganic Hybrid Zeolites Containing Organic Frameworks ». Dans Nanohybridization of Organic-Inorganic Materials, 171–90. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92233-9_8.

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Thomas, J. M., et Carol Williams. « Zeolites : Their Characteristic Structural Features ». Dans Chemical Reactions in Organic and Inorganic Constrained Systems, 49–80. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4582-1_5.

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Rhodes, Christopher J., et Chantal S. Hinds. « ESR Studies of Organic Radical Cations in Zeolites ». Dans Topics in Molecular Organization and Engineering, 119–45. Dordrecht : Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0493-7_5.

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Freeman, C. M., D. W. Lewis, T. V. Harris, A. K. Cheetham, N. J. Henson, P. A. Cox, A. M. Gorman et al. « Simulating the Behavior of Organic Molecules in Zeolites ». Dans ACS Symposium Series, 326–40. Washington, DC : American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0589.ch024.

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Guisnet, M., P. Magnoux et C. Canaff. « Coke Formation on Protonic Zeolites : Rate and Selectivity ». Dans Chemical Reactions in Organic and Inorganic Constrained Systems, 131–40. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4582-1_10.

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Thomas, John M., et Charis R. Theocharis. « Clays, Zeolites and Other Microporous Solids for Organic Synthesis ». Dans Modern Synthetic Methods, 249–304. Berlin, Heidelberg : Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83758-6_4.

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Ramamurthy, V., et Nicholas J. Turro. « Photochemistry of Organic Molecules Within Zeolites : Role of Cations ». Dans Topics in Inclusion Science, 239–82. Dordrecht : Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0119-6_9.

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Schwieger, W., K. H. Bergk, D. Freude et H. Pfeifer. « Synthesis of Pentasil Zeolites With and Without Organic Templates ». Dans ACS Symposium Series, 274–90. Washington, DC : American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0398.ch020.

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Actes de conférences sur le sujet "Organic zeolites"

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Petrus, Roman, Jolanta Warchoł, Waldemar Prokop et Magdalena Warzybok. « Removal of Volatile Organic Compounds (VOCs) on synthesized zeolites ». Dans Chemical technology and engineering. Lviv Polytechnic National University, 2019. http://dx.doi.org/10.23939/cte2019.01.332.

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Koudoumas, E., S. Couris, P. Seta, A. Rassat et S. Leach. « Optical Limiting Action of Methano Fullerenes and Fullerenes Incorporated in Cyclodextrins ». Dans The European Conference on Lasers and Electro-Optics. Washington, D.C. : Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cthh45.

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C60 dissolved in organic solvents is known to exhibit important nonlinear optical response leading to strong optical limiting action. However its solubility is very poor in most of the organic solvents and practically negligible in water. The fullerene molecules are indeed very hydrophobic compounds with a great tendency even in organic solvents to form aggregates. Among the main routes explored to modify their solubility and properties and in order to prevent aggregation, is their insertion in host matrices such as polymer, zeolites or complexing agents such as γ-cyclodextrins and calixarenes).
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Pratiwi, M. I., N. Afifah et R. Saleh. « Decoloration of organic dyes using zeolites supported Fe-doped ZnO under UV light irradiation ». Dans INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES 2016 (ISCPMS 2016) : Proceedings of the 2nd International Symposium on Current Progress in Mathematics and Sciences 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4991130.

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MONNEYRON, P., M. H. MANERO et J. N. FOUSSARD. « SINGLE AND MULTI COMPONENT ADSORPTION OF VOLATILE ORGANIC COMPOUNDS ONTO HIGH SILICA ZEOLITES - DISCUSSION OF ADSORBED SOLUTION THEORY ». Dans Proceedings of the Third Pacific Basin Conference. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704320_0044.

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Arayachukiat, Sunatda, Taradon Pironchart et Kanokwan Kongpatpanich. « The Versatile and Tunable Metal-Organic Framework MOF for Condensate Decontamination ». Dans Offshore Technology Conference Asia. OTC, 2022. http://dx.doi.org/10.4043/31664-ms.

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Abstract Contamination of heavy metals especially for Mercury (Hg) and Arsenic (As) in condensates becomes one of major concerns in Natural Gas production due to theirs high toxicity and carcinogenicity. The key challenge to develop adsorbents for Hg/As removal is to find suitable porous materials with high adsorption capacity, long-term stability and easy to handle the toxic wastes after the adsorption process. Metal-organic frameworks (MOFs) are one of promising porous materials constructed from metal clusters and organic linkers to create the 3D framework structures. MOFs are one of the promising adsorbents for removal of Hg/As from condensates owning to their versatile structures, tunable porosity, and tailorable chemical functionalities. In this work, Zr-based MOFs have been developed for dual removal of Hg and As species owning to their chemical stability in moisture conditions, which is highly desirable for industrial processes. Zr-based MOFs with different topology and pore size distribution have been synthesized for Hg/As adsorption to understand the contribution of porous structure on the removal of Hg/As species in condensates. The performance of Zr-based MOFs results showed Hg and As removal up to 99.5% in condensates from several petroleum sources. The removal efficiencies were found to be influenced by topology of MOF adsorbents and the speciation of Hg/As in different petroleum sources. In addition, Zr-based MOFs have proposed some future trends and challenges of porous material that can be used as an alternative to the conventional metal oxides and zeolites.
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Farago, Tomas, et Patrik Cermak. « APPLICATION OF STABILIZING AGENTS IN CONTAMINATED SOILS OF OLD MINING AREAS ». Dans 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/5.1/s20.005.

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Soil pollution by potentially toxic elements (As, Sb, Cu, Zn, Pb) near the mining areas has become a serious environmental problem. These risk elements can be released into the environment, causing a risk to human health. Stabilized pollution in various materials may constitute an additional risk in the long term. Organic acids play an important role in mobilizing contaminants. In the present work, various stabilizing agents (iron nanoparticles � nanoscale zerovalent iron (nZVI), amorphous manganese oxide (AMO), biochar (BC), natural and synthetic zeolites) were investigated in terms of their stabilizing potential under simulated rhizosphere conditions and their consequences in the mineral composition of samples. One of the aims of this work was to understand the reactivity of potential sorbents in contaminated soils of the abandoned Sb-deposit and subsequent mobility of arsenic and antimony by one-step pot experiments using citric and acetic acid. Another goal of this work was to determine the effectiveness of Aspergillus niger and Neosartorya fischeri strains producing organic acids (citric acid, oxalic acid, acetic acid) in bioleaching and bioaccumulation of Cu, Zn and Pb from mining waste from tailings pond.
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Işık, Özgün, Figen Kırkpınar et Yılmaz Şayan. « Organik Etlik Piliç Karma Yemlerine Zeolit İlavesi ». Dans 6th International Students Science Congress. Izmir International Guest Student Association, 2022. http://dx.doi.org/10.52460/issc.2022.006.

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Bu çalışma organik etlik piliç karma yemlerine zeolit ilavesinin performans üzerine etkilerinin belirlenmesi amacıyla yapılmıştır. Çalışmada 400 adet karışık cinsiyette Hubbard Red Isa Ja yavaş gelişen etlik civciv kullanılmıştır. Hayvanlar Kontrol ve Zeolit olmak üzere iki gruba ayrılarak, organik yetiştirme koşullarında 12 hafta süre ile bakılmıştır. Kontrol grubu karma yemlerine zeolit ilavesi yapılmazken Zeolit grubu karma yemlerine %1 oranında zeolit ilave edilmiştir. Çalışmada ilk 2 hafta civciv büyütme bölümünde bulunan civcivler 2. hafta sonu barınağın yarı perdeli ve açık hava gezinme alanı bulunan bölümüne alınmıştır. Kontrol ve Deneme gruplarına 0-6. haftalar arasında etlik civciv başlangıç organik karma yemleri ve 7-12. haftalar arasında ise etlik piliç bitirme organik karma yemleri ad libitum olarak verilmiştir. Yem materyali Ödemiş Meslek Yüksekokulu Yem Hazırlama Ünitesi’nde hazırlanmış, kimyasal analizleri de Yem Analiz Laboratuvarında yapılmıştır. Grupların deneme sonu elde edilen 12. hafta canlı ağırlık bulguları ve karkas randımanlarının karşılaştırılmasında SPSS v.16 paket programında ANOVA prosedürü (SPSS Inc., 2007) kullanılmıştır. Çalışma sonucunda grupların haftalık canlı ağırlıkları arasında istatistiksel olarak bir fark görülmemiştir (P>0.05). Grupların ortalama canlı ağırlıkları deneme başlangıcı, 2. hafta, 4. hafta, 6. hafta, 8. hafta, 10. hafta ve 12. hafta sırası ile Kontrol grubunda 41.41g, 210.31 g, 662.73 g, 1350.38 g, 1849.52 g, 2750.60 ve 3450.80 g; Zeolit grubunda 41.05 g, 205.47g, 663.06 g, 1407.36 g, 1989.66 g, 2802.90 g ve 3464.00 g olarak bulunmuştur. Grupların 0-12. haftalar arasındaki ortalama toplam yem tüketimleri ve yemden yararlanma değerleri sırası ile Kontrol grubunda 1439.90 kg ve 2.15; Zeolit grubunda 1451.20 kg ve 2.15 olarak saptanmıştır. Deneme sonu ortalama karkas randımanı, Kontrol grubunda %71.20; Zeolit grubunda %72.30 olarak bulunmuştur. Grupların, ortalama günlük canlı ağırlık artışları, yem tüketimleri, yemden yararlanma oranları, karkas randımanları benzer bulunmuştur. Gruplarda belirlenen ölüm oranları Kontrol ve Zeolit gruplarında sırası ile 0-2. haftalar arası %0.5 ve %0.5, 2-12. haftalar arası %1.5 ve %1.0, 0-12. haftalar arasında da %2.0 ve %1.5 olarak zeolit grubunda daha düşük bulunmuştur. Sonuç olarak organik etlik piliç karma yemlerine ilave edilen %1 oranında zeolitin performans verileri üzerine olumsuz bir etkide bulunmadan kullanılabilir olduğu saptanmıştır.
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Tamburello, David, Bruce Hardy et Martin Sulic. « Multi-Component Separation and Purification of Natural Gas ». Dans ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/power2018-7537.

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Over the past decade, several technical developments (such as hydraulic fracturing) have led to an exponential increase in discovering new domestic natural gas reserves. Raw natural gas composition can vary substantially from source to source. Typically, methane accounts for 75% to 95% of the total gas, with the rest of the gas containing ethane, propane, butane, other higher hydrocarbons, and impurities, with the most common including H2O, CO2, N2, and H2S. All natural gas requires some treatment, if only to remove H2O; however, the composition of natural gas delivered to the commercial pipeline grids is tightly controlled. Sub-quality natural gas reserves, which are defined as fields containing more than 2% CO2, 4% N2, or 4 ppm H2S, make up nearly half of the world’s natural gas volume. The development of sub-quality, remote, and unconventional fields (i.e. landfill gas) can present new challenges to gas separation and purification methods. Adsorbent technologies, such as the use of activated carbons, zeolites, or metal-organic frameworks (MOFs), may hold the key to more efficient and economically viable separation methods. This work proposes to prove the applicability of the multi-component potential theory of adsorption (MPTA) to a real world natural gas adsorbent system to properly characterize the adsorbent’s selectivity for an individual gas component using only the single component isotherms. Thus, the real-world gas separation/purification application of a specific adsorbent for a given gas stream can be obtained simply and effectively without the need for large experimental efforts or costly system modifications until after an initial computational screening of perspective materials has been completed. While the current research effort will use natural gas, which is the world’s largest industrial gas separations application, to validate the MPTA, the tools gained through this effort can be applied to other gas separation effort.
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Tominaga, Kazuo, Sohei Fukui, Motoi Tanaka, Tomoharu Hashimoto et Ryuichi Tayama. « Development of New Organic Iodine Filter for FCVS ». Dans 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/icone2020-16416.

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Abstract All of the boiling water reactors in Japan were required to install filtered containment venting system (FCVS) for restart after the accident of Fukushima Daiichi Nuclear Power Plant. FCVS is composed of alkaline water and a metal fiber filter (MFF). Alkaline water has the function of reducing aerosol and inorganic iodine (I2). MFF is constituted for the purpose of removing the aerosol which was not able to be removed with alkaline water. With the above system, the released aerosol can be removed with DF1000 and inorganic iodine DF100. On the other hand, organic iodine that cannot be removed by alkaline water and MFF is removed by silver zeolite added downstream of the FCVS because of its high scattering property. Silver zeolite has particle of silver in the pores of the zeolite. Organic iodine is removed by chemical bonding with the silver. In the current system, the silver zeolite is DF50. Hitachi has developed the organic iodine removal system focusing on removing liquid chemicals for the purpose of improving the performance andmaintain ability, and reducing the price. In this presentation, we report the ionic liquid (IL) that has high heat resistance, high radiation resistance and high gas adsorption among liquid chemicals. In the small-scale tests, we found that IL has a higher performance than DF250, and improved maintainability by liquid property that is able to discharge with scrubber water at the same time, and have got the prospect of reducing manufacturing costs.
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Kachousangi, Marziye Javaheri, Rahmatollah Rahimi et Mohamad Mehdi Kashani-Motlagh. « Synthesis and characterization of zeolite-encapsulated porphyrins ». Dans The 13th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland : MDPI, 2009. http://dx.doi.org/10.3390/ecsoc-13-00195.

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Rapports d'organisations sur le sujet "Organic zeolites"

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Yaghi, Omar M. Metal-organic and zeolite imidazolate frameworks (MOFs and ZIFs) for highly selective separations. Office of Scientific and Technical Information (OSTI), septembre 2012. http://dx.doi.org/10.2172/1050881.

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Dye, R. C., R. E. Hermes, M. G. Martinez et N. M. Peachey. Inorganic-organic composite nanoengineered films using self-assembled monolayers for directed zeolite film growth. Office of Scientific and Technical Information (OSTI), octobre 1997. http://dx.doi.org/10.2172/534511.

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