Download or read book Dense Mixed conducting Ceramic Membrane Reactor for Oxidative Coupling of Methane written by Yongxian Zeng and published by . This book was released on 1998 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxidative Coupling of Methane in a Dense Tubular Ceramic Membrane Reactor with High Yields written by F. T. Akin and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Analysis of Dense Ceramic Membrane Reactors for the Oxidative Coupling of Methane written by Weijian Wang and published by . This book was released on 1994 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ionic Conducting Ceramic Membrane Reactor for Partial Oxidation of Light Hydrocarbons written by F. Tülin Akin and published by . This book was released on 2002 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dense tubular membrane reactors using Bi 1.5 Y 0.3 Sm 0.2 O 3-8 (BYS) may provide a method for increasing the selectivity and yields of partial oxidation of methane across the threshold required for commercial application. The development of a dense tubular membrane reactor that successfully optimizes reaction variables for maximal efficiency requires the preparation of dead end dense tubular membranes, the design of a reactor, high temperature sealing of the tubes, and systematic empirical and theoretical studies of process variables. Dense BYS tubes are fabricated by cold isostatic pressing method. The membrane reactor vessel is designed to ensure isothermal conditions for the tubes and for monitoring and controlling of the experiments. The isothermal condition requires the successful accomplishment of a high temperature sealing of tubular membranes onto inert ceramic tubes. A methodology to select a ceramic-glass composite seal is developed. Based on this methodology, BYS tubes are successfully sealed onto a mullite tube using a pyrex glass and BYS powder based seal. Following the design of the BYS tubular dense membrane reactor, a series of experiments that vary over ranges of P O2, P CH4,temperature and flow rates are conducted. Best one-pass C 2 (C 2 H 4 +C 2 H 6) yield achieved for oxidative coupling of methane in the BYS dead-end membrane reactor is 35% at a C2 selectivity of 54% at 900oC. The oxygen permeation fluxes through tubular BYS membrane reactors under oxidative coupling of methane reaction conditions are approximately 1.5 to 3.5 times higher than those under oxygen permeation conditions with He as the purge. The same membrane reactor was also used to conduct a series of experiments to study the selective oxidation of ethane to ethylene. At 875ʻC, per pass ethylene yield of 56% with ethylene selectivity of 80% was obtained in the membrane reactor. Under reaction conditions, the oxygen permeation flux through the dense membrane is over an order of magnitude higher than those under oxygen permeation conditions with He as the purge. The differences in the oxygen permeation fluxes obtained through the BYS membrane during oxidative coupling of methane and selective oxidation of ethane experiments are explained by a mathematical model that takes into account the downstream conditions and reaction taking place.
Download or read book Membrane Reactor Engineering written by Angelo Basile and published by John Wiley & Sons. This book was released on 2016-09-19 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uniquely focussed on the engineering aspects of membrane reactors Provides tools for analysis with specific regard to sustainability Applications include water treatment, wastewater recycling, desalination, biorefineries, agro-food production Membrane reactors can bring energy saving, reduced environmental impact and lower operating costs
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.
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.
Download or read book Handbook of Membrane Reactors written by Angelo Basile and published by Elsevier. This book was released on 2013-04-04 with total page 973 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane reactors are increasingly replacing conventional separation, process and conversion technologies across a wide range of applications. Exploiting advanced membrane materials, they offer enhanced efficiency, are very adaptable and have great economic potential. There has therefore been increasing interest in membrane reactors from both the scientific and industrial communities, stimulating research and development. The two volumes of the Handbook of membrane reactors draw on this research to provide an authoritative review of this important field.Volume 2 reviews reactor types and industrial applications, beginning in part one with a discussion of selected types of membrane reactor and integration of the technology with industrial processes. Part two goes on to explore the use of membrane reactors in chemical and large-scale hydrogen production from fossil fuels. Electrochemical devices and transport applications of membrane reactors are the focus of part three, before part four considers the use of membrane reactors in environmental engineering, biotechnology and medicine. Finally, the book concludes with a discussion of the economic aspects of membrane reactors.With its distinguished editor and international team of expert contributors, the two volumes of the Handbook of membrane reactors provide an authoritative guide for membrane reactor researchers and materials scientists, chemical and biochemical manufacturers, industrial separations and process engineers, and academics in this field. Discusses integration of membrane technology with industrial processes Explores the use of membrane reactors in chemical and large-scale hydrogen production from fossil fuels Considers electrochemical devices and transport applications of membrane reactors
Download or read book Non oxidative Coupling of Methane for Use in a Hydrogen Transporting Membrane Reactor written by Michael O'Neal Nutt and published by . This book was released on 2000 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methane Coupling by Membrane Reactor Quarterly Technical Progress Report December 25 1994 March 24 1995 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Research efforts during this quarter concentrated on two issues. The first issue is related to the chemistry of oxygen conducting materials that could be used as dense membranes in the membrane reactors. Mixed oxides of La, Sr, Fe, Ce, Yb etc., were synthesized, characterized and studied for their catalytic activity towards the oxidative coupling of methane. Heavy metal oxides of lanthanum, strontium and iron, which form good oxygen conductors, showed very poor methane coupling activity. Perovskites of the Strontium-Cerium-Yitribium series showed moderate activity for methane coupling. These could be potential candidates for dense membrane synthesis, since they also have moderate oxygen conduction properties. The second area of research focus was the development of a radial flow catalytic membrane reactor in which methane coupling was carried out over a catalyst that was deposited inside the pores of a ceramic porous membrane. Catalytic results from the high temperature oxidative coupling of methane in these radial flow membrane reactors are presented in this report. By exploring the reactor performance in membranes of pore diameters of 2.0[mu]m, 0.2[mu]m, and 0.02[mu]m, the effect of the diffusional regime on the methane. coupling activity was demonstrated. The smallest pore diameter membranes exhibited lowest hydrocarbon selectivities.
Download or read book Inorganic Membrane Reactors written by Xiaoyao Tan and published by John Wiley & Sons. This book was released on 2015-03-02 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane reactors combine membrane functions such as separation, reactant distribution, and catalyst support with chemical reactions in a single unit. The benefits of this approach include enhanced conversion, increased yield, and selectivity, as well as a more compact and cost-effect design of reactor system. Hence, membrane reactors are an effective route toward chemical process intensification. This book covers all types of porous membrane reactors, including ceramic, silica, carbon, zeolite, and dense metallic reactors such as Pd or Pd-alloy, oxygen ion-conducting, and proton-conducting ceramics. For each type of membrane reactor, the membrane transport principles, membrane fabrication, configuration and operation of membrane reactors, and their current and potential applications are described comprehensively. A summary of the critical issues and hurdles for each membrane reaction process is also provided, with the aim of encouraging successful commercial applications. The audience for Inorganic Membrane Reactors includes advanced students, industrial and academic researchers, and engineers with an interest in membrane reactors.
Download or read book Solid State Electrochemistry II written by Vladislav V. Kharton and published by John Wiley & Sons. This book was released on 2012-12-21 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ideal addition to the companion volume on fundamentals, methodologies, and applications, this second volume combines fundamental information with an overview of the role of ceramic membranes, electrodes and interfaces in this important, interdisciplinary and rapidly developing field. Written primarily for specialists working in solid state electrochemistry, this first comprehensive handbook on the topic focuses on the most important developments over the last decade, as well as the methodological and theoretical aspects and practical applications. This makes the contents equally of interest to material, physical and industrial scientists, and to physicists. Also available as a two-volume set.
Download or read book Fabrication and Characterization of Dense Ceramic Membranes for Partial Oxidation of Methane written by and published by . This book was released on 1995 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this technology, air is used as the oxidant for methane conversion reactions, thiu eliminating tne need for an expensive oxygen plant. Mixed-conducting ceramic materials have been produced from mixed-oxide system of the La-Sr-Fe-Co-O (SFC) type, in the form of tubes and bars. Thermodynamic stability of the tubes was studied vs oxygen partial pressure by high-temperature XRD. Mechanical properties of the SFC-2 (SrFeCo{sub 0.5}O(subscript x)) material were adequate for reactor use. Electronic and ionic conductivities showed that SFC-2 is unique in that its ratio of ionic to electronic conductance is close to unity. Performance of the membrane tubes was good only with SFC-2. Fracture of other SFC tubes was consequence of an oxygen gradient that introduced a volumetric lattice difference between the inner and outer walls. SFC-2 tubes provided methane conversion efficiencies>99% in a reactor and have operated successfully for>1000 h.
Download or read book Dual layer Functional Ceramic Hollow Fibre Membranes for Partial Oxidation of Methane written by Zhentao Wu and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the unique mechanism of oxygen permeation through dense ceramic membranes with the mixed ionic-electronic conducting property, these membranes have been widely studied for oxygen separation. It has been several decades since the use of a dense ceramic membrane reactor for methane conversion was proposed. One of the major reasons for persistent worldwide research efforts to develop such dense ceramic membrane reactors is the advantages that result from combining oxygen separation and catalytic reactions within a single unit. Besides the significant progress that has been made to date, more and more effort has been directed towards the development of more stable membrane materials with higher oxygen permeation, more advanced membrane micro-structures, membrane configurations with higher surface area per unit volume and better membrane reactor designs. By improving the aforementioned membrane and membrane reactor properties, lower operating temperatures, longer life time and reduced costs can be achieved. The evolution of membrane reactor designs has progressed through a number of stages, from an initial disk-type design to flat-sheet stack or tubular designs with higher surface areas. It is not until very recently that ceramic hollow fibre membrane with further increased surface area/volume ratios of up to 3000 m2/m3 has been developed. Although there has been a consistent progress in improving membrane configurations, the way that catalyst is employed in a membrane reactor is still based on packing catalyst particles on the membrane or inside the reactor. This occupies a considerable amount of space and as a consequence the actual surface area/volume ratio of a membrane reactor design is significantly lower than that of the membrane itself. In order to develop a highly compact membrane reactor design for partial oxidation of methane (POM) with the maximum possible surface area/volume ratio, this thesis focuses on the development of a functional ceramic hollow fibre membrane with a novel dual-layer structure. The outer layer is designed for oxygen separation while the inner layer can be considered as a catalytic substrate layer. Such dual-layer ceramic hollow fibre membranes can be fabricated by a novel single-step co-extrusion and co-sintering process. This new membrane fabrication process allows for the simultaneous formation of the dual-layer membrane structure with excellent adhesion between the two layers even at high operating temperatures. Moreover, as well as changes in the compositions of the membrane material, aspects of the membrane structure, such as the thickness of the outer oxygen separation layer, can be adjusted during the co-extrusion process, in order to achieve higher oxygen permeation and subsequently better reactor performance. Although the functional dual-layer ceramic hollow fibre membranes discussed in this thesis are designed for POM, there are generic advantages of such membrane structures and the membrane fabrication process. Therefore, membranes of this type can be transferred to other membrane processes of great importance, such as oxygen separation and solid oxide fuel cells (SOFC).
Download or read book Investigation of Membrane Reactors Based on Dense Mixed conducting Ceramics for Separation and Catalysis Process written by Jian Xue and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dense ceramic membrane, oxygen separation, hydrogen separation, catalytic membrane reactor. - Gasdichte keramische Membran, Sauerstoffabtrennung, Wasserstoffabtrennung, katalytischer Membranreaktor.
Download or read book Handbook Of Advanced Methods And Processes In Oxidation Catalysis From Laboratory To Industry written by Daniel Duprez and published by World Scientific. This book was released on 2014-07-24 with total page 1035 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive overview of the most recent developments in both total oxidation and combustion and also in selective oxidation. For each topic, fundamental aspects are paralleled with industrial applications. The book covers oxidation catalysis, one of the major areas of industrial chemistry, outlining recent achievements, current challenges and future opportunities. One distinguishing feature of the book is the selection of arguments which are emblematic of current trends in the chemical industry, such as miniaturization, use of alternative, greener oxidants, and innovative systems for pollutant abatement. Topics outlined are described in terms of both catalyst and reaction chemistry, and also reactor and process technology.
