Academic literature on the topic 'Catalytic membrane'

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Journal articles on the topic "Catalytic membrane"

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Psaltou, Savvina, Manassis Mitrakas, and Anastasios Zouboulis. "Catalytic Membrane Ozonation." Encyclopedia 1, no. 1 (January 21, 2021): 131–43. http://dx.doi.org/10.3390/encyclopedia1010014.

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Catalytic membrane ozonation is a hybrid process that combines membrane filtration and catalytic ozonation. The membrane deposited with an appropriate solid material acts as catalyst. As a consequence, the catalytic membrane contactor can act simultaneously as contactor (i.e., improving the transfer/dissolution of gaseous ozone into the liquid phase), as well as reactor (i.e., oxidizing the organic compounds). It can be used in water and wastewater treatment limiting the disadvantages of membrane filtration (i.e., lower removal rates of emerging contaminants or fouling occurrence) and ozonation (i.e., selective oxidation, low mineralization rates, or bromate (BrO3−) formation). The catalytic membrane ozonation process can enhance the removal of micropollutants and bacteria, inhibit or decrease the BrO3− formation and additionally, restrict the membrane fouling (i.e., the major/common problem of membranes’ use). Nevertheless, the higher operational cost is the main drawback of these processes.
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Chen, Ya Nan, Xiang Zheng, Di Chen, and Ye Yang. "The Evaluation of Photo Catalytic-Membrane Reactor with Nanomaterials for Removing Virus." Materials Science Forum 743-744 (January 2013): 706–12. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.706.

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Nanometer photo catalytic-membrane reactor integrated photo catalytic technology with membrane separation technology was applied to remove virus existing in water. Bacteriophage f2 was used as surrogates for human enteric viruses. Two kinds of nanomaterials (TiO2and ZnO) were selected as the catalyst. Three kinds of membranes interception performance for virus, adsorption efficiency of nanomaterial for virus, inactivated effect for virus with photo catalysis, and the comprehensive effect to f2 of photo catalytic-membrane reactor were studied under the transmembrane pressure of 20Kpa, with nanomaterial concentration of 100mg/L, light dose of 20mJ/cm2. It showed that the interception effect of flat membrane with casting was the best. the adsorption efficiency of the two kinds of nanomaterials was different, 1.478 lg and 0.201 lg for TiO2and ZnO, respectively. The removal effect of the photo catalytic oxidation system to f2 was similar, both in 2-3 log. The removal efficiency of the photo catalytic-membrane reactor system has no obvious difference, both in 3-4 log, and it is improved significantly compared to the effect of individual photo catalysis and membrane separation. Further research indicates that: the elimination function of coupling system to f2 includes UV-inactivated, adsorption of nanomaterials, the inactivation of nanomaterials, the effect of oxide moiety which formed after nanomaterials absorbing ultraviolet light and membrane retention.
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Abdallah, Heba. "A Review on Catalytic Membranes Production and Applications." Bulletin of Chemical Reaction Engineering & Catalysis 12, no. 2 (August 1, 2017): 136. http://dx.doi.org/10.9767/bcrec.12.2.462.136-156.

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The development of the chemical industry regarding reducing the production cost and obtaining a high-quality product with low environmental impact became the essential requirements of the world in these days. The catalytic membrane is considered as one of the new alternative solutions of catalysts problems in the industries, where the reaction and separation can be amalgamated in one unit. The catalytic membrane has numerous advantages such as breaking the thermodynamic equilibrium limitation, increasing conversion rate, reducing the recycle and separation costs. But the limitation or most disadvantages of catalytic membranes related to the high capital costs for fabrication or the fact that manufacturing process is still under development. This review article summarizes the most recent advances and research activities related to preparation, characterization, and applications of catalytic membranes. In this article, various types of catalytic membranes are displayed with different applications and explained the positive impacts of using catalytic membranes in various reactions. Copyright © 2017 BCREC Group. All rights reserved.Received: 1st April 2016; Revised: 14th February 2017; Accepted: 22nd February 2017How to Cite: Abdallah, H. (2017). A Review on Catalytic Membranes Production and Applications. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (2): 136-156 (doi:10.9767/bcrec.12.2.462.136-156)Permalink/DOI: http://dx.doi.org/10.9767/bcrec.12.2.462.136-156
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Hughes, Ronald. "Composite palladium membranes for catalytic membrane reactors." Membrane Technology 2001, no. 131 (March 2001): 9–13. http://dx.doi.org/10.1016/s0958-2118(01)80152-x.

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Galiano, Francesco, Roberto Castro-Muñoz, Raffaella Mancuso, Bartolo Gabriele, and Alberto Figoli. "Membrane Technology in Catalytic Carbonylation Reactions." Catalysts 9, no. 7 (July 19, 2019): 614. http://dx.doi.org/10.3390/catal9070614.

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In this review, the recent achievements on the use of membrane technologies in catalytic carbonylation reactions are described. The review starts with a general introduction on the use and function of membranes in assisting catalytic chemical reactions with a particular emphasis on the most widespread applications including esterification, oxidation and hydrogenation reactions. An independent paragraph will be then devoted to the state of the art of membranes in carbonylation reactions for the synthesis of dimethyl carbonate (DMC). Finally, the application of a specific membrane process, such as pervaporation, for the separation/purification of products deriving from carbonylation reactions will be presented.
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Algieri, Catia, Gerardo Coppola, Debolina Mukherjee, Mahaad Issa Shammas, Vincenza Calabro, Stefano Curcio, and Sudip Chakraborty. "Catalytic Membrane Reactors: The Industrial Applications Perspective." Catalysts 11, no. 6 (May 29, 2021): 691. http://dx.doi.org/10.3390/catal11060691.

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Catalytic membrane reactors have been widely used in different production industries around the world. Applying a catalytic membrane reactor (CMR) reduces waste generation from a cleaner process perspective and reduces energy consumption in line with the process intensification strategy. A CMR combines a chemical or biochemical reaction with a membrane separation process in a single unit by improving the performance of the process in terms of conversion and selectivity. The core of the CMR is the membrane which can be polymeric or inorganic depending on the operating conditions of the catalytic process. Besides, the membrane can be inert or catalytically active. The number of studies devoted to applying CMR with higher membrane area per unit volume in multi-phase reactions remains very limited for both catalytic polymeric and inorganic membranes. The various bio-based catalytic membrane system is also used in a different commercial application. The opportunities and advantages offered by applying catalytic membrane reactors to multi-phase systems need to be further explored. In this review, the preparation and the application of inorganic membrane reactors in the different catalytic processes as water gas shift (WGS), Fisher Tropsch synthesis (FTS), selective CO oxidation (CO SeLox), and so on, have been discussed.
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ANDERSON, M. A., F. TISCARENO-LECHUGA, Q. XU, and C. G. JUN HILL. "ChemInform Abstract: Catalytic Ceramic Membranes and Membrane Reactors." ChemInform 22, no. 17 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199117325.

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Jialin, Li, Wang Yazhen, Yang Changying, Long Guangdou, and Shen Hong. "Membrane catalytic deprotonation effects." Journal of Membrane Science 147, no. 2 (September 1998): 247–56. http://dx.doi.org/10.1016/s0376-7388(98)00126-4.

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Tellez-Cruz, Miriam M., Jorge Escorihuela, Omar Solorza-Feria, and Vicente Compañ. "Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges." Polymers 13, no. 18 (September 10, 2021): 3064. http://dx.doi.org/10.3390/polym13183064.

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The study of the electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels attracts a great deal of attention by different researchers. The main role of this process is in mitigating the worldwide energy crisis through a closed technological carbon cycle, where chemical fuels, such as hydrogen, are stored and reconverted to electricity via electrochemical reaction processes in fuel cells. The scientific community focuses its efforts on the development of high-performance polymeric membranes together with nanomaterials with high catalytic activity and stability in order to reduce the platinum group metal applied as a cathode to build stacks of proton exchange membrane fuel cells (PEMFCs) to work at low and moderate temperatures. The design of new conductive membranes and nanoparticles (NPs) whose morphology directly affects their catalytic properties is of utmost importance. Nanoparticle morphologies, like cubes, octahedrons, icosahedrons, bipyramids, plates, and polyhedrons, among others, are widely studied for catalysis applications. The recent progress around the high catalytic activity has focused on the stabilizing agents and their potential impact on nanomaterial synthesis to induce changes in the morphology of NPs.
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Ding, Wenjuan, Sitong Xiang, Fei Ye, Tian Gui, Yuqin Li, Fei Zhang, Na Hu, Meihua Zhu, and Xiangshu Chen. "Effects of Seed Crystals on the Growth and Catalytic Performance of TS-1 Zeolite Membranes." Membranes 10, no. 3 (March 13, 2020): 41. http://dx.doi.org/10.3390/membranes10030041.

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Dense and good catalytic performance TS-1 zeolite membranes were rapidly prepared on porous mullite support by secondary hydrothermal synthesis. The properties of seed crystals were very important for the preparation of high-catalytic performance TS-1 zeolite membranes. Influences of seed crystals (Ti/Si ratios, size, morphology, and zeolites concentration of the seed suspension) on the growth and catalytic property of TS-1 zeolite membranes were investigated in details. High Ti/Si ratio, medium-size, and morphology of the seed crystals were critical for preparing the high-performance TS-1 zeolite membrane. Compared with the bi-layer TS-1 zeolite membrane (inner and outer of the mullite tube), the mono-layer TS-1 zeolite membrane had a better catalytic performance for Isopropanol IPA oxidation with H2O2. When the Ti/Si ratio, size, and morphology of the TS-1 zeolites were 0.030, 300 nm, ellipsoid, and the zeolites concentration of the seed suspension was 5%, the IPA conversion, and flux through the TS-1 zeolite membrane were 98.23% and 2.58 kg·m−2·h−1, respectively.
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Dissertations / Theses on the topic "Catalytic membrane"

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Augustine, Alexander Sullivan. "Supported Pd and Pd/Alloy Membranes for Water-Gas Shift Catalytic Membrane Reactors." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/99.

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This work describes the application of porous metal supported Pd-membranes to the water-gas shift catalytic membrane reactor in the context of its potential application to the Integrated Gasification Combined Cycle (IGCC) process. The objective of this work was to develop a better understanding of Pd-membrane fabrication techniques, water-gas shift catalytic membrane reactor operation, and long-term behavior of the Pd-membranes under water-gas shift conditions. Thin (1.5 - 16 um) Pd-membranes were prepared by electroless deposition techniques on porous metal supports by previously developed methods. Pd-membranes were installed into stainless steel modules and utilized for mixed gas separation (H2/inert, H2/H2O, dry syngas, and wet syngas) at 350 - 450C and 14.5 atma to investigate boundary layer mass transfer resistance and surface inhibition. Pd-membranes were also installed into stainless steel modules with iron-chrome oxide catalyst and tested under water-gas shift conditions to investigate membrane reactor operation in the high pressure (5.0 - 14.6 atma) and high temperature (300 - 500C) regime. After the establishment of appropriate operating conditions, long-term testing was conducted to determine the membrane stability through He leak growth analysis and characterization by SEM and XRD. Pd and Pd/Au-alloy membranes were also investigated for their tolerance to 1 - 20 ppmv of H2S in syngas over extended periods at 400C and 14.0 atma. Water-gas shift catalytic membrane reactor operating parameters were investigated with a focus on high pressure conditions such that high H2 recovery was possible without a sweep gas. With regard to the feed composition, it was desirable to operate at a low H2O/CO ratio for higher H2 recovery, but restrained by the potential for coke formation on the membrane surface, which occurred at a H2O/CO ratio lower than 2.6 at 400C. The application of the Pd-membranes resulted in high CO conversion and H2 recovery for the high temperature (400 - 500C) water-gas shift reaction which then enabled high throughput. Operating at high temperature also resulted in higher membrane permeance and less Pd-surface inhibition by CO and H2O. The water-gas shift catalytic membrane reactor was capable of stable CO conversion and H2 recovery (96% and 88% respectively) at 400C over 900 hours of reaction testing, and 2,500 hours of overall testing of the Pd-membrane. When 2 ppmv H2S was introduced into the membrane reactor, a stable CO conversion of 96% and H2 recovery of 78% were observed over 230 hours. Furthermore, a Pd90Au10-membrane was effective for mixed gas separation with up to 20 ppmv H2S present, achieving a stable H2 flux of 7.8 m3/m2-h with a moderate H2 recovery of 44%. The long-term stability under high pressure reaction conditions represents a breakthrough in Pd-membrane utilization.
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Escorihuela, Roca Sara. "Novel gas-separation membranes for intensified catalytic reactors." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/121139.

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[ES] La presente tesis doctoral se centra en el desarrollo de nuevas membranas de separación de gases, así como su empleo in-situ en reactores catalíticos de membrana para la intensificación de procesos. Para este propósito, se han sintetizado varios materiales, como polímeros para la fabricación de membranas, catalizadores tanto para la metanación del CO2 como para la reacción de síntesis de Fischer-Tropsch, y diversas partículas inorgánicas nanométricas para su uso en membranas de matriz mixta. En lo referente a la fabricación de las membranas, la tesis aborda principalmente dos tipos: orgánicas e inorgánicas. Con respecto a las membranas orgánicas, se han considerado diferentes materiales poliméricos, tanto para la capa selectiva de la membrana, así como soporte de la misma. Se ha trabajado con poliimidas, puesto que son materiales con temperaturas de transición vítrea muy alta, para su posterior uso en reacciones industriales que tienen lugar entre 250-300 ºC. Para conseguir membranas muy permeables, manteniendo una buena selectividad, es necesario obtener capas selectivas de menos de una micra. Usando como material de soporte otro tipo de polímero, no es necesario estudiar la compatibilidad entre ellos, siendo menos compleja la obtención de capas finas. En cambio, si el soporte es de tipo inorgánico, un exhaustivo estudio de la relación entre la concentración y la viscosidad de la solución polimérica es altamente necesario. Diversas partículas inorgánicas nanométricas se estudiaron para favorecer la permeación de agua a través de los materiales poliméricos. En segundo lugar, en cuanto a membranas inorgánicas, se realizó la funcionalización de una membrana de paladio para favorecer la permeación de hidrógeno y evitar así la contaminación por monóxido de carbono. El motivo por el cual se dopó con otro metal la capa selectiva de la membrana metálica fue para poder emplearla en un reactor de Fischer-Tropsch. Con relación al diseño y fabricación de los reactores, durante esta tesis, se desarrolló el prototipo de un microreactor para la metanación de CO2, donde una membrana polimérica de capa fina selectiva al agua se integró para evitar la desactivación del catalizador, y a su vez desplazar el equilibrio y aumentar la conversión de CO2. Por otro lado, se rediseñó un reactor de Fischer-Tropsch para poder introducir una membrana metálica selectiva a hidrogeno y poder inyectarlo de manera controlada. De esta manera, y siguiendo estudios previos, el objetivo fue mejorar la selectividad a los productos deseados mediante el hidrocraqueo y la hidroisomerización de olefinas y parafinas con la ayuda de la alta presión parcial de hidrógeno.
[CAT] La present tesi doctoral es centra en el desenvolupament de noves membranes de separació de gasos, així com el seu ús in-situ en reactors catalítics de membrana per a la intensificació de processos. Per a aquest propòsit, s'han sintetitzat diversos materials, com a polímers per a la fabricació de membranes, catalitzadors tant per a la metanació del CO2 com per a la reacció de síntesi de Fischer-Tropsch, i diverses partícules inorgàniques nanomètriques per al seu ús en membranes de matriu mixta. Referent a la fabricació de les membranes, la tesi aborda principalment dos tipus: orgàniques i inorgàniques. Respecte a les membranes orgàniques, diferents materials polimèrics s'ha considerat com a candidats prometedors, tant per a la capa selectiva de la membrana, així com com a suport d'aquesta. S'ha treballat amb poliimides, ja que són materials amb temperatures de transició vítria molt alta, per al seu posterior ús en reaccions industrials que tenen lloc entre 250-300 °C. Per a aconseguir membranes molt permeables, mantenint una bona selectivitat, és necessari obtindre capes selectives de menys d'una micra. Emprant com a material de suport altre tipus de polímer, no és necessari estudiar la compatibilitat entre ells, sent menys complexa l'obtenció de capes fines. En canvi, si el suport és de tipus inorgànic, un exhaustiu estudi de la relació entre la concentració i la viscositat de la solució polimèrica és altament necessari. Diverses partícules inorgàniques nanomètriques es van estudiar per a afavorir la permeació d'aigua a través dels materials polimèrics. En segon lloc, quant a membranes inorgàniques, es va realitzar la funcionalització d'una membrana de pal¿ladi per a afavorir la permeació d'hidrogen i evitar la contaminació per monòxid de carboni. El motiu pel qual es va dopar amb un altre metall la capa selectiva de la membrana metàl¿lica va ser per a poder emprar-la en un reactor de Fischer-Tropsch. En relació amb el disseny i fabricació dels reactors, durant aquesta tesi, es va desenvolupar el prototip d'un microreactor per a la metanació de CO2, on una membrana polimèrica de capa fina selectiva a l'aigua es va integrar per a així evitar la desactivació del catalitzador i al seu torn desplaçar l'equilibri i augmentar la conversió de CO2. D'altra banda, un reactor de Fischer-Tropsch va ser redissenyat per a poder introduir una membrana metàl¿lica selectiva a l'hidrogen i poder injectar-lo de manera controlada. D'aquesta manera, i seguint estudis previs, el objectiu va ser millorar la selectivitat als productes desitjats mitjançant el hidrocraqueix i la hidroisomerització d'olefines i parafines amb l'ajuda de l'alta pressió parcial d'hidrogen.
[EN] The present thesis is focused on the development of new gas-separation membranes, as well as their in-situ integration on catalytic membrane reactors for process intensification. For this purpose, several materials have been synthesized such as polymers for membrane manufacture, catalysts for CO2 methanation and Fischer-Tropsch synthesis reaction, and inorganic materials in form of nanometer-sized particles for their use in mixed matrix membranes. Regarding membranes manufacture, this thesis deals mainly with two types: organic and inorganic. With regards to the organic membranes, different polymeric materials have been considered as promising candidates, both for the selective layer of the membrane, as well as a support thereof. Polyimides have been selected since they are materials with very high glass transition temperatures, in order to be used in industrial reactions which take place at temperatures around 250-300 ºC. To obtain highly permeable membranes, while maintaining a good selectivity, it is necessary to develop selective layers of less than one micron. Using another type of polymer as support material, it is not necessary to study the compatibility between membrane and support. On the other hand, if the support is inorganic, an exhaustive study of the relation between the concentration and the viscosity of the polymer solution is highly necessary. In addition, various inorganic particles were studied to favor the permeation of water through polymeric materials. Secondly, as regards to inorganic membranes, the functionalization of a palladium membrane to favor the permeation of hydrogen and avoid carbon monoxide contamination was carried out. The membrane selective layer was doped with another metal in order to be used in a Fischer-Tropsch reactor. Regarding the design and manufacture of the reactors used during this thesis, a prototype of a microreactor for CO2 methanation was carried out, where a thin-film polymer membrane selective to water was integrated to avoid the deactivation of the catalyst and to displace the equilibrium and increase the CO2 conversion. On the other hand, a Fischer-Tropsch reactor was redesigned to introduce a hydrogen-selective metal membrane and to be able to inject it in a controlled manner. In this way, and following previous studies, the aim is to enhance the selectivity to the target products by hydrocracking and hydroisomerization the olefins and paraffins assisted by the presence of an elevated partial pressure of hydrogen.
I would like to acknowledge the Spanish Government, for funding my research with the Severo Ochoa scholarship.
Escorihuela Roca, S. (2019). Novel gas-separation membranes for intensified catalytic reactors [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/121139
TESIS
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Wales, Michael Dean. "Membrane contact reactors for three-phase catalytic reactions." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/20589.

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Doctor of Philosophy
Chemical Engineering
Mary E. Rezac
Membrane contact reactors (MCRs) have been evaluated for the selective hydro-treating of model reactions; the partial hydrogenation of soybean oil (PHSO), and the conversion of lactic acid into commodity chemicals. Membranes were rendered catalytically active by depositing metal catalyst onto the polymer "skin" of an asymmetric membrane. Hydrogen was supplied to the support side of the membrane and permeated from the support side to the skin side, where it adsorbed directly onto the metal surface. Liquid reactant was circulated over the membrane, allowing the liquid to come into direct contact with the metal coated surface of the membrane, where the reaction occurred. Our membrane contact reactor approach replaces traditional three-phase batch slurry reactors. These traditional reactors possess inherent mass transfer limitations due to low hydrogen solubility in liquid and slow diffusion to the catalyst surface. This causes hydrogen starvation at the catalyst surface, resulting in undesirable side reactions and/or extreme operating pressures of 100 atmospheres or more. By using membrane reactors, we were able to rapidly supply hydrogen to the catalyst surface. When the PHSO is performed in a traditional slurry reactor, the aforementioned hydrogen starvation leads to a high amounts of trans-fats. Using a MCR, we were able to reduce trans-fats by over 50% for equal levels of hydrogenation. It was further demonstrated that an increase in temperature had minimal effects on trans-fat formation, while significantly increasing hydrogenation rates; allowing the system to capture higher reaction rates without adversely affecting product quality. Additionally, high temperatures favors the hydrogenation of polyenes over monoenes, leading to low amounts of saturated fats. MCRs were shown to operator at high temperatures and: (1) capture high reaction rates, (2) minimize saturated fats, and (3) minimize trans-fats. We also demonstrated lactic acid conversion into commodity chemicals using MCRs. Our results show that all MCR experiments had faster reaction rate than all of our controls, indicating that MCRs have high levels of hydrogen coverage at the catalyst. It was also demonstrated that changing reaction conditions (pressure and temperature) changed the product selectivities; giving the potential for MCRs to manipulate product selectivity.
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Gouveia, Gil Ana Maria. "Catalytic hollow fibre membrane reactors for H2 production." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/39795.

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Pre-combustion decarbonisation is one of the three main routes widely discussed for CO2 capture from fossil fuels. This thesis focuses on the development of a catalytic hollow fibre membrane reactor for the combined steam methane reforming (SMR) and water-gas shift (WGS) reaction, using a Ni-based catalyst, and at a temperature window suitable for harvesting pure H2, a clean energy carrier, from the reaction by a Pd membrane. Apart from developing the catalyst and the Pd-based composite membrane, which are normally considered as the two essential components of a membrane reactor involving hydrogen separation, this study introduces the concept of incorporating the catalyst into a micro-structured ceramic hollow fibre substrate to promote mass transfer efficiency. Meanwhile, the impact of each fabrication step, i.e. catalyst composition and preparation, ceramic hollow fibre fabrication, catalyst incorporation and electroless plating of Pd membranes, on the assembly and final performance of the catalytic hollow fibre membrane reactor was systematically evaluated. In contrast to previous studies involving micro-structured ceramic hollow fibres for catalytic reactions, the one developed in this study possesses a plurality of unique micro-channels, with significant openings on the inner surface of the ceramic hollow fibre. In addition to reduced mass transfer resistance for both catalytic reaction and hydrogen permeation, a microstructure of this type significantly facilitates catalyst incorporation and, as a results, enable the application of this hollow fibres for a wider spectrum of catalytic reactions.
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Prabhu, Anil K. "Catalytic Transformation of Greenhouse Gases in a Membrane Reactor." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/26430.

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Supported Ni and Rh catalysts were developed for the reforming of two greenhouse gases, methane and carbon dioxide to syngas (a mixture of hydrogen and carbon monoxide). This is an endothermic, equilibrium limited reaction. To overcome the thermodynamic limitations, a commercially available porous membrane (Vycor glass) was used in a combined reactor-separator configuration. This was to selectively remove one or more of the products from the reaction chamber, and consequently shift the equilibrium to the right. However, the separation mechanism in this membrane involved Knudsen diffusion, which provided only partial separations. Consequently, there was some transport of reactants across the membrane and this led to only marginal improvements in performance. To overcome this limitation, a new membrane was developed by modifying the Vycor substrate by the chemical vapor deposition of a silica precursor. This new membrane, termed Nanosil, provided high selectivity to hydrogen at permeabilities comparable to the support material. Application of this membrane in the combined reactor-separator unit provided higher conversions than that obtained using the Vycor membrane.
Ph. D.
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Umoh, Reuben Mfon. "Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor." Thesis, Robert Gordon University, 2009. http://hdl.handle.net/10059/2117.

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In this work, inorganic membranes with highly dispersed metallic catalysts on macroporous titania-washcoated alumina supports were produced, characterized and tested in a catalytic membrane reactor. The reactor, operated as a contactor in the forced pore-flow-through mode, was used for the conversion of synthesis gas (H2 + CO) into mixed alcohols and hydrocarbons via the Fischer-Tropsch synthesis. Carbon monoxide conversions of 78% and 90% at near atmospheric pressure (300kPa) and 493K were recorded over cobalt and bimetallic Co-Mn membranes respectively. The membranes also allowed for the conversion of carbon dioxide, thus eliminating the need for a CO2 separation interphase between synthesis gas production and Fischer-Tropsch synthesis. Catalytic tests conducted with the membrane reactor with different operating conditions (of temperature, pressure and feed flow rate) on cobalt-based membranes gave very high selectivity to specific products, mostly higher alcohols (C2 – C8) and paraffins within the gasoline range, thereby making superfluous any further upgrading of products to fuel grade other than simple dehydration. Manganese-promoted cobalt membranes were found not only to give better Fischer-Tropsch activity, but also to promote isomerization of paraffins, which is good for boosting the octane number of the products, with the presence of higher alcohols improving the energy density. The membrane reactor concept also enhanced the ability of cobalt to catalyze synthesis gas conversions, giving an activation energy Ea of 59.5 kJ/mol.K compared with 86.9 – 170 kJ/mol.K recorded in other reactors. Efficient heat transfer was observed because of the open channel morphology of the porous membranes. A simplified mechanism for both alcohol and hydrocarbon production based on hydroxycarbene formation was proposed to explain both the stoichiometric reactions formulated and the observed product distribution pattern.
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Keuler, Johan Nico. "Optimising catalyst and membrane performance and performing a fundamental analysis on the dehydrogenation of ethanol and 2-butanol in a catalytic membrane reactor." Thesis, Link to the online version, 2000. http://hdl.handle.net/10019.1/1277.

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Rahman, Mukhlis Bin A. "Catalytic hollow fibre membrane micro-reactors for energy applications." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/7097.

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An asymmetric ceramic hollow fibre is proposed as a substrate for the development of a catalytic hollow fibre microreactor (CHFMR) and a catalytic hollow fibre membrane microreactor (CHFMMR). The ceramic substrate that is prepared using the phase inversion and sintering technique has a finger-like structure and a sponge-like region in the inner region and the outer surface respectively. The finger-like structure consists of thousands of conical microchannels distributed perpendicularly to the lumen of ceramic hollow fibres onto which a catalyst is impregnated using the sol-gel Pechini method to improve a catalytic reaction. To further enhance the catalytic reaction, a membrane has been incorporated on the outer layer of ceramic hollow fibre. This study focuses on the use of palladium (Pd) and palladium/silver (Pd/Ag) membranes to separate hydrogen from reaction zones in the water-gas shift (WGS) reactions and the ethanol steam reforming (ESR) respectively. In the development of CHFMMR, the fabrication of Pd and Pd/Ag membranes is carried out prior to the catalyst impregnation process to avoid the dissolution of catalyst into the plating solution due to the presence of ammonia and ethylenediaminetetraacetic acid (EDTA). The catalytic activity tests show that the CHFMR, that does not have the Pd membrane on its outer surface, improves the carbon monoxide (CO) conversion compared with its fixed-bed counterpart. The presence of conical microchannels is expected to enhance the activities of the catalyst in the substrate. The incorporations of Pd and Pd/Ag membranes on the outer layer of ceramic hollow fibres enable pure hydrogen to be produced in the shell-side for both the WGS reaction and the ESR. The CHFMMR is used to remove one of the products enabling the WGS reaction to favour the formation of product. It also facilitates the small amount of catalyst to be used to produce significant amount of hydrogen in the ESR.
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Kingsbury, Benjamin F. K. "A morphological study of ceramic hollow fibre membranes : a perspective on multifunctional catalytic membrane reactors." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6089.

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In recent years ceramic membrane technology has advanced considerably and ceramic membranes are now being applied to a number of high temperature applications, in particular in the energy industry as membrane reactors. Due to the thermal stability of ceramic materials, development in this area is extremely promising as these applications cannot be realized using polymeric membrane technology. Although a wide range of ceramic materials have been developed and processing techniques have improved considerably, the high production cost and lack of control over membrane properties when fabrication processes are scaled up are prohibitive in the commercial application of ceramic membrane technology. However, by using a dry-wet spinning process and the combined phase inversion and sintering technique, novel asymmetric hollow fibre morphologies consisting of a porous sponge-like structure and finger-like macrovoids in which catalyst may be deposited can be prepared in a cost effective way. These asymmetric hollow fibres are prepared from raw materials and are suitable for use in catalytic membrane reactors. Fibre morphology is determined by the rheological properties of the ceramic spinning suspension as well as the parameters used during fibre spinning and the effect of sintering during heat treatment. A generic mechanism has been suggested for the formation of asymmetric structures and the parameters at each of these three stages have been varied systematically in order to predict and control hollow fibre structure. Hollow fibres prepared in this way have been characterized in terms of morphology, pore size distribution, porosity and mechanical strength in terms of their applicability to membrane reactor applications. The versatility of this preparation technique is demonstrated by the inclusion of a chapter describing a catalytic membrane reactor for hydrogen production by water-gas-shift as well as a reactor for the dehydrogenation of propane. It should also be noted that this reactor design could be applied to a number of other catalytic gas phase reactions.
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Grigoropoulou, Georgia. "Phase transfer catalysed reactions under membrane conditions." Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369329.

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Books on the topic "Catalytic membrane"

1

Thomas, Tsotsis Theodore, ed. Catalytic membranes and membrane reactors. Weinheim: Wiley-VCH, 2002.

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Rickey, Welch G., ed. Organized multienzyme systems: Catalytic properties. Orlando: Academic Press, 1985.

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High temperature catalytic membrane reactors: Topical report. U. S. Dept. of Energy., 1990.

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Collins, John Patrick. Catalytic decomposition of ammonia in a membrane reactor. 1993.

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Simulation of ethylbenzene dehydrogenation in microporous catalytic membrane reactors. U. S. Dept. of Energy., 1989.

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Eiichi, Torikai, and United States. National Aeronautics and Space Administration., eds. Production of an ion-exchange membrane-catalytic electrode bonded material for electrolytic cells. Washington, D.C: National Aeronautics and Space Administration, 1986.

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Current Trends and Future Developments on Membranes: Photocatalytic Membranes and Photocatalytic Membrane Reactors. Elsevier, 2018.

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Basile, Angelo, and Teko W. Napporn. Current Trends and Future Developments on Membranes: Membrane Systems for Hydrogen Production. Elsevier, 2020.

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Basile, Angelo, and Giuseppe Spazzafumo. Current Trends and Future Developments on Membranes: Cogeneration Systems and Membrane Technology. Elsevier, 2020.

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Basile, Angelo, and Giuseppe Spazzafumo. Current Trends and Future Developments on Membranes: Co-Generation Systems and Membrane Technology. Elsevier, 2020.

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Book chapters on the topic "Catalytic membrane"

1

Bredesen, Rune. "Inorganic Catalytic Membrane." In Encyclopedia of Membranes, 1041–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44324-8_314.

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Bredesen, Rune. "Inorganic Catalytic Membrane." In Encyclopedia of Membranes, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-40872-4_314-2.

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Pitzalis, Emanuela, Claudio Evangelisti, Nicoletta Panziera, Angelo Basile, Gustavo Capannelli, and Giovanni Vitulli. "Solvated Metal Atoms in the Preparation of Catalytic Membranes." In Membranes for Membrane Reactors, 371–80. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470977569.ch14.

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Anderson, M. A., F. Tiscareño-Lechuga, Q. Xu, and C. G. Hill. "Catalytic Ceramic Membranes and Membrane Reactors." In Novel Materials in Heterogeneous Catalysis, 198–215. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0437.ch019.

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Volkov, V. V., I. V. Petrova, V. I. Lebedeva, V. I. Roldughin, and G. F. Tereshchenko. "Palladium-Loaded Polymeric Membranes for Hydrogenation in Catalytic Membrane Reactors." In Membranes for Membrane Reactors, 531–48. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470977569.ch24.

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Fontananova, Enrica. "Decatungstate, Catalytic Membrane Containing." In Encyclopedia of Membranes, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-40872-4_858-1.

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Fontananova, Enrica. "Decatungstate, Catalytic Membrane Containing." In Encyclopedia of Membranes, 512–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44324-8_858.

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Cerneaux, Sophie. "Polymeric-Ceramic Catalytic Membrane." In Encyclopedia of Membranes, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-40872-4_492-1.

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Kurungot, Sreekumar, and Takeo Yamaguchi. "Compact Catalytic Membrane Reactors for Reforming Applications Based on an Integrated Sandwiched Catalyst Layer." In Membranes for Membrane Reactors, 227–42. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470977569.ch7.

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Alhazov, Artiom, Rudolf Freund, and Sergey Verlan. "Promoters and Inhibitors in Purely Catalytic P Systems." In Membrane Computing, 126–38. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-14370-5_8.

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Conference papers on the topic "Catalytic membrane"

1

Schmidt, Jurgen, and K. Georgieva-Angelova. "SIMULATION OF MASS TRANSFER IN A CATALYTIC MEMBRANE REACTOR." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p10.30.

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Pines, David, and Phillip Birbara. "An Ultrapure Water Processing System Utilizing Membrane Pervaporation and Catalytic Oxidation Technologies." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1991. http://dx.doi.org/10.4271/911600.

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Liu, Min, Zhi-Ping Zhao, and Jian-Hui Li. "Ceramic Membrane Immobilized Salen Catalysts and Their Use in Asymmetric Catalytic Reactions." In International Conference on Chemical,Material and Food Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/cmfe-15.2015.9.

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Park, Hyung Gyu, Jaewon Chung, Costas P. Grigoropoulos, Ralph Greif, Mark Havstad, and Jefffey D. Morse. "Transport in a Microfluidic Catalytic Reactor." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47216.

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A study of the heat and mass transfer, flow, and thermodynamics of the reacting flow in a catalytic micro-reactor is presented. Methanol reforming is utilized in the fuel processing system driving a micro-scale proton exchange membrane fuel cell. Understanding the flow and thermal transport phenomena as well as the reaction mechanisms is essential for improving the efficiency of the reforming process as well as the quality of the processed fuel. Numerical studies have been carried out to characterize the transport in a silicon microfabricated reactor system. On the basis of these results, optimized conditions for fuel processing are determined.
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Shi, Jinjun, Jiusheng Guo, and Bor Jang. "A New Type of High Temperature Membrane for Proton Exchange Membrane Fuel Cells." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97043.

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The proton exchange membrane (PEM) fuel cell operated at high temperature is advantageous than the current low temperature PEM fuel cell, in that high temperature operation promotes electro-catalytic reaction, reduces the carbon monoxide poisoning, and possibly eliminates methanol crossover in Direct Methanol Fuel Cell (DMFC). However, current commercially viable membranes for PEMFC and DMFC, such as the de-facto standard membrane of Dupont Nafion membrane, only work well at temperatures lower than 80°C. When it is operated at temperatures of higher than 80°C, especially more than 100°C, the fuel cell performance degrades dramatically due to the dehydration. Therefore, high temperature proton exchange membrane material is now becoming a research and development focus in fuel cell industry. In this paper, a new type of high temperature PEM membrane material was investigated. This new type of membrane material was optimally selected from polyether ether ketone (PEEK)-based materials, poly (phthalazinon ether sulfone ketone) (PPESK). The performance of the sulfonated PPESK membrane with degree of sulfonation (DS) of 93% was studied and compared to that of Nafion (®Dupont) 117 membrane. The result showed SPPESK has a comparable performance to Nafion (®Dupont) 117 at low temperature (<80°C) and better performance at high temperature (>80°C). The other advantage of SPPESK is that it has much lower cost than that of Nafion. These characteristics make SPPESK an attractive candidate for high temperature proton exchange membrane material.
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Nagy, Endre. "Mass Transport Through Biocatalytic Membrane Reactors." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59403.

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A mathematical model and its solution were developed to calculate the mass transport through catalytic membrane layer by means of explicit, closed expressions even in the case of the nonlinear Michaelis-Menten reaction kinetics and/or of variable mass transport — diffusion coefficient, convective velocity — parameters. Some typical examples on the Thiele modulus, applying the Michaelis-Menten kinetics and its limiting cases, namely the first-order kinetic (KM≫cm) and zero-order kinetic (cm≫KM) are shown for the prediction of the concentration distribution and the mass transfer rates as a function of the reaction modulus, namely first-order- and the zero-order reactions. It was shown the significant differences of the results obtained by the three different reaction orders.
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Guo, Jifeng, and Yanjun Lu. "Study on the Dyeing Wastewater by the Photo Catalytic Oxidation Membrane Bioreactor (pMBR)." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517610.

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Xu, Lei, Tie Li, Xiuli Gao, Yuelin Wang, Rui Zheng, Lei Xie, and Lichung Lee. "A low power catalytic combustion gas sensor based on a suspended membrane microhotplate." In 2011 IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2011. http://dx.doi.org/10.1109/nems.2011.6017303.

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Yazid, Hanani, Nurul Atikah Abdul Rahman, and Abdul Mutalib Md Jani. "Catalytic reduction of p-nitrophenol on Au/TiO2 powder and Au/TiO2 membrane." In 4TH INTERNATIONAL SCIENCES, TECHNOLOGY AND ENGINEERING CONFERENCE (ISTEC) 2020: Exploring Materials for the Future. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0043554.

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Zeng, Pingying, Kang Wang, Ryan Falkenstein-Smith, and Jeongmin Ahn. "A Ceramic-Membrane-Based Methane Combustion Reactor With Tailored Function of Simultaneous Separation of Carbon Dioxide From Nitrogen." In ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2014 8th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fuelcell2014-6510.

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Today, industry has become more dependent on natural gases and combustion processes, creating a tremendous pressure to reduce their emissions. Although the current methods such as chemical looping combustion (CLC) and pure oxygen combustion have several advantages, there are still many limitations. A ceramic membrane based methane combustion reactor is an environmentally friendly technique for heat and power generation. This work investigates the performance of a perovskite-type SrSc0.1Co0.9O3−δ (SSC) membrane reactor for the catalytic combustion of methane. For this purpose, the mixed ionic and electronic conducting SSC oxygen-permeable planar membrane was prepared by a dry-pressing technique, and the SSC powder catalyst was spray coated on the permeation side of the membrane. Then, the prepared SSC membrane with the catalyst was used to perform the catalytic combustion of methane. The oxygen permeability of the membrane reactor was studied. Also, the methane conversion rates and CO2 selectivity at various test conditions were reported.
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Reports on the topic "Catalytic membrane"

1

Liu, Paul K. T. Catalytic Membrane Program. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/764722.

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Boyle, T. J., C. J. Brinker, T. J. Gardner, R. C. Hughes, and A. G. Sault. Catalytic Membrane Sensors. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/2882.

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Kleiner, R. N. Catalytic membrane program novation: High temperature catalytic membrane reactors. Final report. Office of Scientific and Technical Information (OSTI), August 1998. http://dx.doi.org/10.2172/303973.

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Stuart Nemser, PhD. Novel Catalytic Membrane Reactors. Office of Scientific and Technical Information (OSTI), October 2010. http://dx.doi.org/10.2172/1063626.

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Gallaher, G., T. Gerdes, and R. Gregg. Development of high temperature catalytic membrane reactors. Final report. Office of Scientific and Technical Information (OSTI), February 1992. http://dx.doi.org/10.2172/503459.

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Ma, Y. H., W. R. Moser, S. Pien, and A. B. Shelekhin. Development of hollow fiber catalytic membrane reactors for high temperature gas cleanup. Office of Scientific and Technical Information (OSTI), October 1994. http://dx.doi.org/10.2172/10185653.

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Liu, Paul K. T. Catalytic membrane program. Quarterly report for the period August 1999--October 1999. Office of Scientific and Technical Information (OSTI), November 1999. http://dx.doi.org/10.2172/761032.

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Ma, Yi H., M. R. Moser, and S. M. Pien. Development of hollow-fiber catalytic-membrane reactors for high-temperature gas cleanup. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/10110112.

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Boespflug, E. P., C. J. Brinker, J. P. Collins, T. J. Gardner, A. G. Sault, and A. C. Y. Tsai. Hydrogen Production for Fuel Cells by Selective Dehydrogenation of Alkanes in Catalytic Membrane Reactors. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/5655.

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George W. Huber, Aniruddha A. Upadhye, David M. Ford, Surita R. Bhatia, and Phillip C. Badger. Fast Pyrolysis Oil Stabilization: An Integrated Catalytic and Membrane Approach for Improved Bio-oils. Final Report. Office of Scientific and Technical Information (OSTI), October 2012. http://dx.doi.org/10.2172/1053421.

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