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Development Of Composite Metal Membrane Using Cold Gas Dynamic Spray For Hydrogen Separation
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Book Synopsis Development of Composite Metal Membrane Using Cold Gas Dynamic Spray for Hydrogen Separation by : Sunday Temitope Oyinbo
Download or read book Development of Composite Metal Membrane Using Cold Gas Dynamic Spray for Hydrogen Separation written by Sunday Temitope Oyinbo and published by . This book was released on 2020 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Membrane Engineering for the Treatment of Gases by : Enrico Drioli
Download or read book Membrane Engineering for the Treatment of Gases written by Enrico Drioli and published by Royal Society of Chemistry. This book was released on 2011-07-06 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membranes already have important applications in artificial organs, the processing of biotechnological products, food manufacture, waste water treatment, and seawater desalination. Their uses in gaseous mixture separations are, however, far from achieving their full potential. Separation of air components, natural gas dehumidification and sweeting, separation and recovery of CO2 from biogas, and H2 from refinery gases are all examples of current industrial applications. The use of membranes for reducing the greenhouse effect and improving energy efficiency has also been suggested. New process intensification strategies in the petrochemical industry have opened up another growth area for gas separation membrane systems and membrane reactors. This two volume set presents the state-of-the-art in membrane engineering for the separation of gases. It addresses future developments in carbon capture and utilization, H2 production and purification, and O2/N2 separation. Topics covered include the: applications of membrane gas separation in the petrochemical industry; implementation of membrane processes for post-combustion capture; commercial applications of membranes in gas separations; simulation of membrane systems for CO2 capture; design and development of membrane reactors for industrial applications; Pd-based membranes in hydrogen production; modelling and simulation of membrane reactors for hydrogen production and purification; novel hybrid membrane/pressure swing adsorption process for gas separation; molecular dynamics as a new tool for membrane design, and physical aging of membranes for gas separations. Volume 2 looks at problems combined with membrane reactors.
Book Synopsis Composite Metal Membranes for Hydrogen Separation Applications by :
Download or read book Composite Metal Membranes for Hydrogen Separation Applications written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel multilayer metal membrane has been developed that can be used for the separation of hydrogen from feed streams with near perfect selectivity. The membrane is comprised of very thin layers of fully dense palladium film deposited on both sides of a thin Group V metal foil, ion-milled prior to sputtering of the palladium. Palladium loading are kept low using the thin film deposition technology: 0.0012 grams of palladium per square centimeter of membrane is typically used, although thinner coatings have been employed. This membrane operates at temperatures on the order of 300 C and is capable of high rates of hydrogen flow. Flows are dependent on the pressure differential applied to the membrane, but flows of 105 sccm/cm2 and higher are regularly observed with differentials below one atmosphere. Long term testing of the membrane for a period in excess of 775 hours under constant conditions showed stable flows and an 85% hydrogen recovery efficiency. A system has been successfully applied to the hydrogen handling system of a proton exchange membrane fuel cell and was tested using a pseudo-reformate feed stream without any degradation in performance.
Book Synopsis Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation by : J. Douglas Way
Download or read book Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation written by J. Douglas Way and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes progress made during the a three year University Coal Research grant (DEFG26-03NT41792) at the Colorado School of Mines. The period of performance was September 1, 2003 through August of 2006. We made excellent progress toward our goal of contributing to the development of high productivity, sulfur tolerant composite metal membranes for hydrogen production and membrane reactors. Composite Pd and Pd alloy metal membranes with thin metal films (1-7 {micro}m) were prepared on porous stainless steel and ceramic supports that meet or exceed the DOE 2010 and 2015 pure hydrogen flux targets at differential pressure of only 20 psi. For example, a 2 {micro}m pure Pd membrane on a Pall AccuSep{reg_sign} substrate achieved an ideal H{sub 2}/N{sub 2} separation factor of over 6000, with a pure hydrogen flux of 210 SCFH/ft{sup 2} at only 20 psig feed pressure. Similar performance was achieved with a Pd{sub 80}Au{sub 20} composite membrane on a similar stainless steel substrate. Extrapolating the pure hydrogen flux of this PdAu membrane to the DOE Fossil Energy target conditions of 150 psia feed pressure and 50 psia permeate pressure gives a value of 508 SCFH/ft{sup 2}, exceeding the 2015 target. At these thicknesses, it is the support cost that will dominate the cost of a large scale module. In a direct comparison of FCC phase PdCu and PdAu alloys on identical supports, we showed that a Pd{sub 85}Au{sub 15} (mass %) alloy membrane is not inhibited by CO, CO{sub 2}, or steam present in a water-gas shift feed mixture at 400 C, has better resistance to sulfur than a Pd{sub 94}Cu{sub 6} membrane, and has over twice the hydrogen permeance.
Book Synopsis Development of Palladium Composite Membranes for Hydrogen Separation by :
Download or read book Development of Palladium Composite Membranes for Hydrogen Separation written by and published by . This book was released on 2004 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two types of palladium composite membrane were investigated for hydrogen separation. A palladium alloy membrane was prepared by electroless plating a layer of palladium (≈20 [mu]m) and then copper onto a commercially available porous (nominal 0.2 [mu]m pores) [alpha]-alumina substrate. The resulting multilayer metal film was annealed at 355 C for several days to promote metallic interdiffusion and alloy formation. During the heat treatment, a maximum hydrogen flux of 0.15 mol (STP)/m2 · s was observed at 355 C and a pressure drop ([Delta]P) across the membrane of 6.8 atm. The H2/Ar ideal separation factor was 68 at these conditions, however, the separation factor decreased upon thermal cycling. The other type of membrane fabricated was a palladium coated vanadium-copper alloy foil where the main advantage is the reduction in palladium film coating thickness to 100 nm per side. New methods are being developed for welding the thin foil into modules for testing. The hydrogen flux through a pinhole-free, 75 [mu]m thick Pd/VCu{sub 1.1}/Pd (atomic %) composite membrane was 0.66 mol (STP)/m2 · at 350 C and [Delta]P = 3.5 atm compared to 0.44 mol (STP)/m2 · s for a 71 [mu]m thick Pd/VCu10/Pd membrane. Vanadium alloy composition was checked using Auger electron spectroscopy (AES).
Book Synopsis Development of Dense Ceramic Membranes for Hydrogen Separation by :
Download or read book Development of Dense Ceramic Membranes for Hydrogen Separation written by and published by . This book was released on 2000 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: We developed novel cermet (i.e., ceramic-metal composite) membranes for separating hydrogen from gas mixtures at high temperature and pressure. The hydrogen permeation rate in the temperature range of 600-900 C was determined for three classes of cermet membranes (ANL-1, ANL-2, and ANL-3). Among these membranes, ANL-3 showed the highest hydrogen permeation rate, with a maximum flux of 3.2 cm3/min-cm2 for a 0.23-mm-thick membrane at 900 C. Effects of membrane thickness and hydrogen partial pressure on permeation rate indicated that bulk diffusion of hydrogen is rate-limiting for ANL-3 membranes. The lack of degradation in permeation rate during exposure to a simulated syngas mixture suggests that ANL-3 membranes are chemically stable and suitable for long-term operation.
Book Synopsis Preparation and Characterization of Composite Membrane for High Temperature Gas Separation. Quarterly Technical Report, December 1, 1996--February 28, 1997 by :
Download or read book Preparation and Characterization of Composite Membrane for High Temperature Gas Separation. Quarterly Technical Report, December 1, 1996--February 28, 1997 written by and published by . This book was released on 1997 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: To develop a new class of permselective inorganic membranes, the authors have identified electroless plating as a potential route to deposit a thin metal film on a porous substrate. Electroless plating is a controlled autocatalytic deposition of continuous film on the surface of a substrate by the interactions of a metal salt and a chemical reducing agent. This method can give thin films of metals, alloys and composites on both conducting and nonconducting surfaces. The objective of this project is to develop thin film palladium membranes for separation of hydrogen in high temperature applications. The authors plan to use electroless plating to deposit thin palladium films on microporous ceramic and silver substrates. They plan to characterize the membrane in terms of permeability and selectivity for gas separation. To accomplish the research objective, the project requires three tasks: (1) development of a process for composite membrane formation; (2) characterization of fabricated composite membrane; and (3) development of theoretical model for hydrogen gas separation. During this quarter they extended their single-staged complete-mixing and cross-flow models to design a Two-Unit-Series (TUS), a Two-Stage Counter-Current Recycle Membrane Cascade (CRMC) and a Five-Stage CRMC arrangement. These designs have been used to study the performance of membrane modules for the separation of hydrogen through Palladium-ceramic composite membranes. The results show that for high-selective membrane, the effect of flow arrangement is of no consequence. Multi-staged cascading significantly improve the product purity and product separation.
Book Synopsis Development of Membranes for Hydrogen Separation by :
Download or read book Development of Membranes for Hydrogen Separation written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous Group IVB and VB alloys were prepared and tested as potential membrane materials but most of these materials were brittle or exhibited cracking during hydrogen exposure. One of the more ductile alloys, V-10Pd (at. %), was fabricated into a thin (107-[mu]m thick) composite membrane coated with 100 nm of Pd on each side. The material was tested for hydrogen permeability, resistance to hydrogen embrittlement, and long term hydrogen flux stability. The hydrogen permeability, [phi], of the V-10Pd membrane was 3.86 x 10−8 mol H2 m−1 s−1 Pa{sup -0.5} (avg. of three different samples) at 400 C, which is slightly higher than the permeability of Pd-23Ag at that temperature. A 1400 h hydrogen flux test at 400 C demonstrated that the rate of metallic interdiffusion was slow between the V-10Pd foil and the 100-nm-thick Pd coating on the surface. However, at the end of testing the membrane cracked at 118 C because of hydrogen embrittlement.
Book Synopsis Ion Track Modification of Polyimide Film for Development of Palladium Composite Membrane for Hydrogen Separation and Purification by : Olushola Rotimi Adeniyi
Download or read book Ion Track Modification of Polyimide Film for Development of Palladium Composite Membrane for Hydrogen Separation and Purification written by Olushola Rotimi Adeniyi and published by . This book was released on 2011 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: South Africaʹs coal and platinum mineral resources are crucial resources towards creating an alternative and environmentally sustainable energy system. The beneficiation of these natural resources can help to enhance a sustainable and effective clean energy base infrastructure and further promote their exploration and exportation for economics gains. By diversification of these resources, coal and the platinum group metals (PGMs) especially palladium market can be further harnessed in the foreseeable future hence SA energy security can be guaranteed from the technological point of view. The South Africa power industry is a critical sector, and has served as a major platform in the South African socio-economic development. This sector has also been identified as a route towards an independent energy base, with global relevance through the development of membrane technologies to effectively and economically separate and purify hydrogen from the gas mixtures released during coal gasification.
Book Synopsis Development of Palladium Composite Membranes for Hydrogen Separation by : S. N. Paglieri
Download or read book Development of Palladium Composite Membranes for Hydrogen Separation written by S. N. Paglieri and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1970 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: NSA is a comprehensive collection of international nuclear science and technology literature for the period 1948 through 1976, pre-dating the prestigious INIS database, which began in 1970. NSA existed as a printed product (Volumes 1-33) initially, created by DOE's predecessor, the U.S. Atomic Energy Commission (AEC). NSA includes citations to scientific and technical reports from the AEC, the U.S. Energy Research and Development Administration and its contractors, plus other agencies and international organizations, universities, and industrial and research organizations. References to books, conference proceedings, papers, patents, dissertations, engineering drawings, and journal articles from worldwide sources are also included. Abstracts and full text are provided if available.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern Cold Spray by : Julio Villafuerte
Download or read book Modern Cold Spray written by Julio Villafuerte and published by Springer. This book was released on 2015-08-24 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the current state of the art of the novel cold spray process. Cold spray is a solid state metal consolidation process, which allows engineers to tailor surface and shape properties by optimizing process parameters, powder characteristics and substrate conditions for a wide variety of applications that are difficult or impossible by other techniques. Readers will benefit from this book's coverage of the commercial evolution of cold spray since the 1980's and will gain a practical understanding of what the technology has to offer.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
