Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Membrane reactor"”.
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Catalytic membrane reactor-separator for environmental applications.
Flow-through catalytic membrane reactors offer the potential for improved conversions at reduced operating temperature due to product separation and catalyst activity. An experimental work dealing with a forced flow-through membrane reactor is the subject of this thesis. The focus is on the …
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Hybrid neural networks models for a membrane reactor
… and time-dependent fed-batch microbial reactor, was developed for a space-dependent steady-state enzymatic reactor. This scheme combines ANN with mass balances and assumed rate expressions. It was shown that this new hybrid scheme performed significantly better than both black-box ANN …
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Catalytic Transformation of Greenhouse Gases in a Membrane Reactor
… 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 …
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Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming
… explores a novel application of catalytic membrane reactors for high- purity hydrogen extraction from bioethanol reforming. Conventional membrane systems employ hydrogen permselective materials such as palladium, polymer membranes, which present several material challenges including …
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Experimental and modeling studies on a catalytic packed bed membrane reactor
… operating conditions in a catalytic packed bed membrane reactor were investigated with the reactant gases H 2 and CO flowing through the membrane tube, and an inert gas N 2 flowing on the outside. The reaction under study was methanol synthesis with BASF catalyst, and a gamma-alumina membrane …
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Studies of the Ethanol Steam Reforming Reaction in a Membrane Reactor
… of this dissertation is advanced inorganic membranes and their application in membrane reactors (MRs). The reaction studied is the ethanol steam reforming (ESR) reaction using Co-Na/ZnO catalysts, chosen because of their high activity and stability. The Co-Na/ZnO catalysts were prepared by a …
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Analysis of a duo-selecting membrane reactor for the water-gas shift
… cells (phosphoric acid and polymer electrolyte membrane fuel cells) and must therefore be removed. The reaction is limited by thermodynamic equilibrium at higher temperatures, while kinetics are unfavorable at the lower temperatures. Current commercial technology uses at least two adiabatic beds …
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Direct synthesis gas conversion to alcohols and hydrocarbons using a catalytic membrane reactor.
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 …
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Development and testing of inorganic membranes for hydrogen separation and purification in a catalytic membrane reactor.
Palladium membranes have been identified as the membranes of choice in hydrogen separation and purification processes due to their infinite selectivity to hydrogen when defect-free. Despite their potentials in hydrogen processes, palladium membranes pose challenges in terms of cost and …
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Experimental and Modeling Studies of the Methane Steam Reforming Reaction at High Pressure in a Ceramic Membrane Reactor
… describes the preparation of a novel inorganic membrane for hydrogen permeation and its application in a membrane reactor for the study of the methane steam reforming reaction. The investigations include both experimental studies of the membrane permeation mechanism and theoretical modeling of …
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Studies on Hydrogen Selective Silica Membranes and the Catalytic Reforming of CH₄ with CO₂ in a Membrane Reactor
… properties of hydrogen selective silica membranes were studied along with the catalytic reforming of CH₄ with CO₂ (CH₄ + CO z 2 CO + 2 H₂) in a hydrogen separation membrane reactor. The silica membranes were prepared by chemical vapor deposition (CVD) of a thin SiO₂ layer on porous …
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Design and testing of an integrated catalytic membrane reactor for deoxygenating water using hydrogen for down-hole injection and process applications.
… this can be seen to be achievable by employing membrane technology. Membrane technologies provide compactness and are already applicable in other water treatments like reverse osmosis. In this study, inorganic tubular ceramic membranes with highly dispersed catalytic metals: palladium and …
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Influence of synthesis parameters on the properties of MXenes: a comparative study of ammonium bifluoride and HCl-LiF etching methods for membrane reactor applications
… hold immense potential for applications in membrane technology due to their unique structural and functional properties. This thesis explores the synthesis of MXenes from Ti3AlC2 MAX phase using various etching methods, including NH4HF2, HCl-LiF, and sonication-assisted techniques. The study …
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High temperature ceramic membrane for CO₂ reuse and syngas production
In recent years, membrane based technologies have attracted much attention thanks to their simplicity in reactor design. The concept proposed is to use mixed ionic-electronic conducting membrane (MIEC) in CO2 reuse and syngas production by taking the advantage of low quality energy resource. The …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
… and metal nanoparticles on continuous-flow microreactors offers an efficient catalytic system that exploits and enhances the advantages of both nanocatalysis and flow chemistry, the so-called flow nanocatalysis approach. Various approaches have been developed for the development of …
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Hydrogen Production by Water Gas Shift Reaction Following Dry Reforming of Biogas Methane in Membrane and Packed Bed Tubular Reactors
… optimization of the catalyst, application in a membrane reactor and kinetic studies of the water gas shift reaction. A portfolio of ternary oxide catalysts with a nominal composition of 3Ni5Cu/CeZrM (where M = La, Mg, Y, Gd, Ca) were developed and prepared by surfactant assisted route. A binary …
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Laccase-based Biocatalytic Systems for Recalcitrant Micro-Pollutants Degradation and Energy Generation
… and efficient enzyme immobilization and bioreactor design are required. In this study, and two membrane bioreactors were proposed for carbamazepine (CBZ) degradation: the hybrid membrane system where laccase-immobilized TiO2 nanoparticles were suspended in the feed solution, and the …
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Enzymatic hydrolysis of liquefied corn starch in a membrane bioreactor
… of this project was to develop and optimize a membrane reactor for the continuous saccharification of liquefied corn starch by glucoamylase. The effects of enzyme concentration, substrate concentration and residence time on starch conversion were studied. Increasing the concentration of enzyme …
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Catalytic membrane reactors for synthesis gas production from natural gas via partial oxidation.
… oil. For the production of synthetic gas, membrane technology presents an attractive advantage improving conversion efficiency by operating as catalyst support, which then also increases the catalyst dispersion, resulting in optimal catalyst load and complete consumption of oxygen and …
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Comparison of the growth and monoclonal antibody production of suspended mammalian cells in three perfusion systems
… and three perfusion systems: the stirred ceramic membrane reactor (SCMR), the alternating tangential flow (ATF) hollow fiber membrane system, and the external spin filter (ESF) system. The batch experiments for each cell line were used as base case scenarios for the comparisons of cell growth and …
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