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Oxygen Transport Ceramic Membranes
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Book Synopsis Journée internationale des bibliothécaires et documentalistes médicaux, Bruxelles, 10 septembre 1955 by :
Download or read book Journée internationale des bibliothécaires et documentalistes médicaux, Bruxelles, 10 septembre 1955 written by and published by . This book was released on 1955 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in Gas Separation by Microporous Ceramic Membranes by : N.K. Kanellopoulos
Download or read book Recent Advances in Gas Separation by Microporous Ceramic Membranes written by N.K. Kanellopoulos and published by Elsevier. This book was released on 2000-09-26 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to the rapidly growing field of microporous ceramic membranes with separating layers of pore diameter less than 2nm. The chapters of this book bring forward a wide range of issues, namely fundamentals of complex sorption and transport processes in micropore structures, highly innovative methods of preparation of microporous membranes and examples of their possible commercial applications. This book presents insights by distinguished investigators, who have contributed significantly to the advance of research efforts in the diverse topics described herein. Recently, significant progress has been made with respect to the development of novel microporous asymmetric membranes, mainly involving modification by means of deposition of additional material within the pores of the substrates. Most state-of-the-art technologies aiming in the development of microporous ceramic membrane are presented in the third section of the book. These include several material deposition methods and techniques on macroporous or mesoporous supports and substrates from the liquid or vapour phase, namely those involving sol-gel, zeolite and chemical vapour deposition techniques. In addition to the above-mentioned methods, the classical technique of carbonizing polymeric deposits along with one of the novel techniques of plasma-treating, organically deposited Langmuir-Blodgett films, are also presented. Nanophase mixed ionic-electron membranes for enhanced oxygen transport are described, which pose a strong candidacy for a number of significant commercial applications.
Download or read book Zwyssig Alberich (1808-1854). written by and published by . This book was released on 1828 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeitungsausschnitte.
Book Synopsis Erinnerung an Anna Maria Cath([a]r[ina]) Pfenninger-Hirzel Gedruckt für theilnehmende Freunde by :
Download or read book Erinnerung an Anna Maria Cath([a]r[ina]) Pfenninger-Hirzel Gedruckt für theilnehmende Freunde written by and published by . This book was released on 1876 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ceramic Membranes for Separation and Reaction by : Kang Li
Download or read book Ceramic Membranes for Separation and Reaction written by Kang Li and published by John Wiley & Sons. This book was released on 2007-04-30 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic Membranes for Reaction and Separation is the first single-authored guide to the developing area of ceramic membranes. Starting by documenting established procedures of ceramic membrane preparation and characterization, this title then focuses on gas separation. The final chapter covers ceramic membrane reactors;- as distributors and separators, and general engineering considerations. Chapters include key examples to illustrate membrane synthesis, characterisation and applications in industry. Theoretical principles, advantages and disadvantages of using ceramic membranes under the various conditions are discussed where applicable.
Book Synopsis Oxygen Transport Ceramic Membranes by : H. U. Anderson
Download or read book Oxygen Transport Ceramic Membranes written by H. U. Anderson and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In the current research, the electrical conductivity and Seebeck coefficient were measured as a function of temperature in air. Based on these measurements, the charge carrier concentration, net acceptor dopant concentration, activation energy of conduction and mobility were estimated. The studies on the fracture toughness of the LSFT and dual phase membranes at room temperature have been completed and reported previously. The membranes that are exposed to high temperatures at an inert and a reactive atmosphere undergo many structural and chemical changes which affects the mechanical properties. To study the effect of temperature on the membranes when exposed to an inert environment, the membranes (LAFT and Dual phase) were heat treated at 1000 C in air and N{sub 2} atmosphere and hardness and fracture toughness of the membranes were studied after the treatment. The indentation method was used to find the fracture toughness and the effect of the heat treatment on the mechanical properties of the membranes. Further results on the investigation of the origin of the slow kinetics on reduction of ferrites have been obtained. The slow kinetics appears to be related to a non-equilibrium reduction pathway that initially results in the formation of iron particles. At long times, equilibrium can be reestablished with recovery of the perovskite phase. 2-D modeling of oxygen movement has been undertaken in order to fit isotope data. The model will serve to study ''frozen'' profiles in patterned or composite membranes.
Book Synopsis Development of Thin Film Oxygen Transport Membranes on Metallic Supports by : Ye Xing
Download or read book Development of Thin Film Oxygen Transport Membranes on Metallic Supports written by Ye Xing and published by Forschungszentrum Jülich. This book was released on 2012 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Oxygen Transport Ceramic Membranes by : S. Bandopadhyay
Download or read book Oxygen Transport Ceramic Membranes written by S. Bandopadhyay and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ti doping on La{sub 1-x}Sr{sub x}FeO{sub 3-{delta}} (LSF) tends to increase the oxygen equilibration kinetics of LSF in lower oxygen activity environment because of the high valence state of Ti. However, the addition of Ti decreases the total conductivity because the acceptor ([Sr{prime}{sub La}]) is compensated by the donor ([Ti{sub Fe}{sup {sm_bullet}}]) which decreases the carrier concentration. The properties of La{sub 0.2}Sr{sub 0.8}Fe{sub 1-x}Ti{sub x}O{sub 3-{delta}} (LSFT, x = 0.45) have been experimentally and theoretically investigated to elucidate (1) the dependence of oxygen occupancy and electrochemical properties on temperature and oxygen activity by thermogravimetric analysis (TGA) and (2) the electrical conductivity and carrier concentration by Seebeck coefficient and electrical measurements. In the present study, dual phase (La{sub 0.2}Sr{sub 0.8}Fe{sub 0.6}Ti{sub 0.4}O{sub 3-{delta}}/Ce{sub 0.9}Gd{sub 0.1}O{sub 2-{delta}}) membranes have been evaluated for structural properties such as hardness, fracture toughness and flexural strength. The effect of high temperature and slightly reducing atmosphere on the structural properties of the membranes was studied. The flexural strength of the membrane decreases upon exposure to slightly reducing conditions at 1000 C. The as-received and post-fractured membranes were characterized using XRD, SEM and TG-DTA to understand the fracture mechanisms. Changes in structural properties of the composite were sought to be correlated with the physiochemical features of the two-phases. We have reviewed the electrical conductivity data and stoichiometry data for La{sub 0.2}Sr{sub 0.8}Cr{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} some of which was reported previously. Electrical conductivity data for La{sub 0.2}Sr{sub 0.8}Cr{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} (LSCrF) were obtained in the temperature range, 752 {approx} 1055 C and in the pO{sub 2} range, 10{sup -18} {approx} 0.5 atm. The slope of the plot of log {sigma} vs. log pO{sub 2} is {approx} 1/5 in the p-type region, pO{sub 2} = 10{sup -5} {approx} 10{sup -1} atm. The pO{sub 2} at which the p-n transition is observed increases with increasing temperature. The activation energy for ionic conduction was estimated to be 0.86 eV from an Arrhenius plot of the minimum conductivity vs. reciprocal temperature. At temperatures below 940 C, a plateau in the conductivity isotherm suggests the presence of a two-phase region. Most likely, phase separation occurs to form a mixture of a perovskite phase and an oxygen vacancy ordered phase related to brownmillerite. Additional data for the oxygen non stoichiometry are presented.
Book Synopsis Mixed Conducting Ceramic Membranes by : Xuefeng Zhu
Download or read book Mixed Conducting Ceramic Membranes written by Xuefeng Zhu and published by Springer. This book was released on 2016-11-09 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to bring together into a single book all aspects of mixed conducting ceramic membranes. It provides a comprehensive description of the fundamentals of mixed ionic-electronic conducting (MIEC) membranes from the basic theories and materials to fabrication and characterization technologies. It also covers the potential applications of MIEC membrane technology in industry. This book offers a valuable resource for all scientists and engineers involved in R&D on mixed conducting ceramic membrane technology, as well as other readers who are interested in catalysis in membrane reactor, solid state electrochemistry, solid oxide fuel cells, and related topics. Xuefeng Zhu, PhD, is a Professor at State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. Weishen Yang, PhD, is the team leader for Membrane Catalysis and New Catalytic Materials and a DICP Chair Professor at State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China.
Book Synopsis Oxygen Transport by Oxygen Potential Gradient in Dense Ceramic Oxide Membranes by :
Download or read book Oxygen Transport by Oxygen Potential Gradient in Dense Ceramic Oxide Membranes written by and published by . This book was released on 1996 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous studies have been conducted in recent years on the partial oxidation of methane to synthesis gas (syngas: CO + H2) with air as the oxidant. In partial oxidation, a mixed-oxide ceramic membrane selectively transports oxygen from the air; this transport is driven by the oxygen potential gradient. Of the several ceramic materials the authors have tested, a mixed oxide based on the Sr-Fe-Co-O system has been found to be very attractive. Extensive oxygen permeability data have been obtained for this material in methane conversion experiments carried out in a reactor. The data have been analyzed by a transport equation based on the phenomenological theory of diffusion under oxygen potential gradients. Thermodynamic calculations were used to estimate the driving force for the transport of oxygen ions. The results show that the transport equation deduced from the literature describes the permeability data reasonably well and can be used to determine the diffusion coefficients and the associated activation energy of oxygen ions in the ceramic membrane material.
Book Synopsis Dense Ceramic Membranes for Methane Conversion by :
Download or read book Dense Ceramic Membranes for Methane Conversion written by and published by . This book was released on 1996 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report focuses on a mechanism for oxygen transport through mixed- oxide conductors as used in dense ceramic membrane reactors for the partial oxidation of methane to syngas (CO and H2). The in-situ separation of O2 from air by the membrane reactor saves the costly cryogenic separation step that is required in conventional syngas production. The mixed oxide of choice is SrCo{sub 0.5}FeO(subscript x), which exhibits high oxygen permeability and has been shown in previous studies to possess high stability in both oxidizing and reducing conditions; in addition, it can be readily formed into reactor configurations such as tubes. An understanding of the electrical properties and the defect dynamics in this material is essential and will help us to find the optimal operating conditions for the conversion reactor. In this paper, we discuss the conductivities of the SrFeCo{sub 0.5}O(subscript x) system that are dependent on temperature and partial pressure of oxygen. Based on the experimental results, a defect model is proposed to explain the electrical properties of this system. The oxygen permeability of SrFeCo{sub 0.5}O(subscript x) is estimated by using conductivity data and is compared with that obtained from methane conversion reaction.
Book Synopsis Advanced Membrane Science and Technology for Sustainable Energy and Environmental Applications by : Angelo Basile
Download or read book Advanced Membrane Science and Technology for Sustainable Energy and Environmental Applications written by Angelo Basile and published by Woodhead Publishing. This book was released on 2011-09 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in membrane materials, selective membrane design, and computer modeling and simulation have contributed greatly to the application of advanced membranes in conventional and alternative power sectors, as well as to clean industry applications. This book presents a comprehensive review of membrane science and technology.
Book Synopsis Contributions to the Development of Oxygen-transporting Materials as Ceramic Membranes for Gas Separation by : Tobias Klande
Download or read book Contributions to the Development of Oxygen-transporting Materials as Ceramic Membranes for Gas Separation written by Tobias Klande and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Modulation and CO2 Reaction of Ceramic Oxygen Transport Membranes (OTM) for Air Separation by : 羅翔譯
Download or read book Study of Modulation and CO2 Reaction of Ceramic Oxygen Transport Membranes (OTM) for Air Separation written by 羅翔譯 and published by . This book was released on 2017 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance Analysis of Oxygen Transport Reactors by : Hassan Badr
Download or read book Performance Analysis of Oxygen Transport Reactors written by Hassan Badr and published by LAP Lambert Academic Publishing. This book was released on 2019-01-25 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study aims at investigating the performance of a cylindrical ion transport reactor designed for oxy-fuel combustion. The cylindrical reactor walls are made of dense, nonporous, mixed-conducting ceramic membranes that only allow oxygen permeation from the outside air into the combustion chamber. The sweep gas (CO2 and CH4) enters the reactor from one side, mixes with the oxygen permeate and the combustion products are discharged from the other side. The process of oxygen permeation through the reactor walls is influenced by the flow condition and composition of air at the feed side (inlet air side) and the gas mixture at the permeate side (sweep gas side). The modelling of the flow process is based on the numerical solution of the conservation equations of mass, momentum, energy and species in the axi-symmetric flow domain. The membrane is modelled as a selective layer in which the oxygen permeation depends on the prevailing temperatures as well as the oxygen partial pressure at both sides of the membrane. The CFD calculations were carried out using FLUENT 12.1 while the mass transfer of oxygen through the membrane is modelled by a set of user defined functions.
Download or read book Ceramic Membranes written by Vitaly Gitis and published by John Wiley & Sons. This book was released on 2016-06-27 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook gives a clear and coherent overview of ceramic membranes, from preparation methods all the way to applications and economics. The authors, who are known for their clear writing style, combine their expertise in environmental engineering and porous materials to cover a wide range of examples, with over 1000 references. Chapters 1, 2 and 3 give a detailed introduction to membrane synthesis, transport mechanisms, and characterisation. Building on this, Chapter 4 outlines the state-of-the-art in ceramic membrane applications, including fuel cells, water purification, gas separation, and the making of cheeses, fruit juice, wine and beer. The final chapter deals with the economics of ceramic membrane processes, using industrial case studies to examine market barriers and opportunities. Ceramics are known throughout history, but now, after thousands of years, they´re making a comeback. Indeed, they may hold the key for addressing three of today´s biggest challenges: clean energy, drinking water and air pollution. This book is a must-have for anyone who wants to enter the ceramic membranes field, or keep up-to-date with the latest developments and applications. This textbook gives a clear and coherent overview of ceramic membranes, from preparation methods all the way to applications and economics. The authors, who are known for their clear writing style, combine their expertise in environmental engineering and porous materials to cover a wide range of examples, with over 1000 references. Chapters 1, 2 and 3 give a detailed introduction to membrane synthesis, transport mechanisms, and characterisation. Building on this, Chapter 4 outlines the state-of-the-art in ceramic membrane applications, including fuel cells, water purification, gas separation, and the making of cheeses, fruit juice, wine and beer. The final chapter deals with the economics of ceramic membrane processes, using industrial case studies to examine market barriers and opportunities. Ceramics are known throughout history, but now, after thousands of years, they´re making a comeback. Indeed, they may hold the key for addressing three of today´s biggest challenges: clean energy, drinking water and air pollution. This book is a must-have for anyone who wants to enter the ceramic membranes field, or keep up-to-date with the latest developments and applications.
Book Synopsis Nonporous Inorganic Membranes by : Anthony F. Sammells
Download or read book Nonporous Inorganic Membranes written by Anthony F. Sammells and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference book addresses the evolution of materials for both oxygen and hydrogen transport membranes and offers strategies for their fabrication as well as their subsequent incorporation into catalytic membrane reactors. Other chapters deal with, e.g., engineering design and scale-up issues, strategies for preparation of supported thin-film membranes, or interfacial kinetic and mass transfer issues. A must for materials scientists, chemists, chemical engineers and electrochemists interested in advanced chemical processing.
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