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Author : Mottlene Wang
Publisher :
ISBN 13 :
Total Pages : 318 pages
Book Rating : 4.:/5 (353 download)
Download or read book High Temperature Hydrogen Sulfide Removal with an Iron Oxide-alumina Sorbent written by Mottlene Wang and published by . This book was released on 1980 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William T. Abel
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.3/5 (91 download)
Download or read book Removal of Hydrogen Sulfide from Hot Producer Gas by Solid Absorbents written by William T. Abel and published by . This book was released on 1974 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Glenn E. Johnson
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (91 download)
Download or read book Removing Hydrogen Sulfide from Synthesis Gas with Iron Oxide at Elevated Pressure written by Glenn E. Johnson and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (727 download)
Download or read book High Temperature Hydrogen Sulfide Removal with Tin Oxide written by and published by . This book was released on 1993 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The system is based on the absorption of hydrogen sulfide (H2S) by stannic (tin) oxide. Two sorbents are required, the first sorbent is tin oxide and the second sorbent is a zinc oxide based material (i.e., zinc ferrite or zinc titanate) which is regenerated by air producing SO2. TDA's process carries out a modified Claus reaction to reduce the SO2 from the second sorbent generation to elemental sulfur. In this case the sulfided stannic oxide forms stannous sulfide (SnS) which reduces the SO2. The absorption by SnO2 could remove over 90% of the H2S from typical coal gas streams, but we use zinc ferrite (or zinc titanate), (a) to reduce H2S to less than 20 ppM and (b) as a source of SO2 in regeneration. Due to stoichiometry of regeneration we want to remove half of the H2S by SnO2 and the remainder by the second sorbent. The reactions with stannic oxide minimize the heat released during H2S removal and regeneration. The absorption by SnO2 is slightly endothermic and cools the gas stream by less that 5°F (2.8°C) during absorption. Regeneration with SO2 is exothermic but releases only 11% of the heat that is liberated in regenerating the ZnO. For a nominal 6.5:1 steam to air the regeneration of ZnO increases the temperature by (asymptotically equal to)400°F. The regeneration of SnO2 increases the temperature by less than 50°F (28°C) in the same gas flow.
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (682 download)
Download or read book High Temperature Hydrogen Sulfide Removal with Stannic Oxide written by and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This contract focuses on the development of sorbents and processes for removal of H2S from hot coal gas with the product of sorbent regeneration being elemental sulfur. TDA Research's process uses a regenerable tin(IV) oxide-based (SnO2) sorbent as the first sorbent and zinc ferrite (or zinc titanate) as a second sorbent.
Author : Jiang Wu
Publisher : Springer
ISBN 13 : 9811068178
Total Pages : 162 pages
Book Rating : 4.8/5 (11 download)
Download or read book High-Temperature H2S Removal from IGCC Coarse Gas written by Jiang Wu and published by Springer. This book was released on 2017-11-07 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides extensive information on high-temperature H2S removal for integrated gasification combined cycle (IGCC) coarse gas, together with briefly introductions to the concept of clean coal technology, and to the mechanism and kinetics of hot coal gas desulfurizers. Readers will gain a comprehensive understanding of available control methods for high-temperature H2S removal in IGCC coarse gas and how the technology has been adopted by industry. As such, the book offers a unique resource for researchers and engineers in the fields of energy science and technology, environmental science and technology, and chemical engineering.
Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (727 download)
Download or read book High Temperature Hydrogen Sulfide Removal written by and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective is to develop and test a regenerable stannic oxide-based sorbent to remove H[sub 2]S from hot coal gases while producing sulfur as the only product. The detailed technical objectives in support of this are: (1) Develop mechanically strong and chemically inert support materials which will retain their properties through multiple absorption regeneration cycles. (2) Develop mathematical models to predict the performance of large-scale systems from benchscale results. (3) Test the durability of the best sorbent/support combinations. (4) Conduct a bench-scale proof of concept test with the best stannic-oxide sorbent. Several approaches are being used to develop long-life sorbents. The investigators have tested sorbents produced by agglomeration, pressing, and extrusion. To date over 50 formulations have been tested, with several showing promise. Table II presents the results on five of these formulations; all of these formulations had surface areas in excess of 2 m[sup 2]/gm. All of the formulations meet the goals for porosity, tin content, and surface area. The crush strength for a 1/8inches dia. by 1/8inches long sorbent is significantly affected by the method of preparing the sorbent.
Download or read book High Temperature Regenerable Hydrogen Sulfide Removal Agents written by and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A system for high temperature desulfurization of coal-derived gases using regenerable sorbents. One sorbent is stannic oxide (tin oxide, SnO.sub. 2), the other sorbent is a metal oxide or mixed metal oxide such as zinc ferrite (ZnFe.sub. 2 O.sub. 4). Certain otherwise undesirable by-products, including hydrogen sulfide (H.sub. 2 S) and sulfur dioxide (SO.sub. 2) are reused by the system, and elemental sulfur is produced in the regeneration reaction. A system for refabricating the sorbent pellets is also described.
Author : E. C. Oldaker
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (191 download)
Download or read book Hydrogen Sulfide Removal from Hot Producer Gas with a Solid Fly Ash-iron Oxide Sorbent written by E. C. Oldaker and published by . This book was released on 1975 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. C. Oldaker
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (191 download)
Download or read book Removal of Hydrogen Sulfide from Hot Low-Btu Gas with Iron Oxide-fly Ash Sorbents written by E. C. Oldaker and published by . This book was released on 1975 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book REMOVAL OF HYDROGEN SULFIDE BY REGENERABLE METAL OXIDE SORBENTS. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT REMOVAL OF HYDROGEN SULFIDE BY REGENERABLE METAL OXIDE SORBENTS Karayýlan, Dilek M.S., Department of Chemical Engineering Supervisor : Prof. Dr. Timur Doðu Co-Supervisor: Prof. Dr. Gülþen Doðu June 2004, 166 pages High-temperature desulfurization of coal-derived fuel gases is an essential process in advanced power generation technologies. It may be accomplished by using metal oxide sorbents. Among the sorbents investigated CuO sorbent has received considerable attention. However, CuO in uncombined form is readily reduced to copper by the H2 and CO contained in fuel gases which lowers the desulfurization efficiency. To improve the performance of CuO-based sorbents, they have been combined with other metal oxides, forming metal oxide sorbents. Sulfidation experiments were carried out at 627 oC using a gas mixture composed of 1 % H2S and 10 % H2 in helium. Sorbent regeneration was carried out in the same reactor on sulfided samples at 700 oC using 6 % O2 in N2. Total flow rate of gas mixture was kept at 100 ml/min in most of the experiments. In this study, Cu-Mn-O, Cu-Mn-V-O and Cu-V-O sorbents were developed by using complexation method. Performance of prepared sorbents were investigated in a fixed-bed quartz microreactor over six sulfidation/regeneration cycles. During six cycles, sulfur retention capacity of Cu-Mn-O decreased slightly from 0.152 to 0.128 (g S)/(g of Sorbent) while some decrease from 0.110 to 0.054 (g S)/(g of Sorbent) was observed with Cu-Mn-V-O. Cu-V-O showed a very good performance in the first sulfidation and excessive thermal sintering in the first regeneration prevented further testing. Sulfur retention capacity of Cu-V-O was calculated as 0.123 (g S)/(g of Sorbent) at the end of the first sulfidation. In addition, SO2 formation in sulfidation experiments was observed only with Cu-V-O sorbent.
Download or read book High-temperature Sorbent Method for Removal of Sulfur Containing Gases from Gaseous Mixtures written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A copper oxide-zinc oxide mixture is used as a sorbent for removing hydrogen sulfide and other sulfur containing gases at high temperatures from a gaseous fuel mixture. This high-temperature sorbent is especially useful for preparing fuel gases for high temperature fuel cells. The copper oxide is initially reduced in a preconditioning step to elemental copper and is present in a highly dispersed state throughout the zinc oxide which serves as a support as well as adding to the sulfur sorption capacity. The spent sorbent is regenerated by high-temperature treatment with an air fuel, air steam mixture followed by hydrogen reduction to remove and recover the sulfur.
Author : Dushyant Shekhawat
Publisher : Elsevier
ISBN 13 : 0444535640
Total Pages : 569 pages
Book Rating : 4.4/5 (445 download)
Download or read book Fuel Cells: Technologies for Fuel Processing written by Dushyant Shekhawat and published by Elsevier. This book was released on 2011-03-18 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel Cells: Technologies for Fuel Processing provides an overview of the most important aspects of fuel reforming to the generally interested reader, researcher, technologist, teacher, student, or engineer. The topics covered include all aspects of fuel reforming: fundamental chemistry, different modes of reforming, catalysts, catalyst deactivation, fuel desulfurization, reaction engineering, novel reforming concepts, thermodynamics, heat and mass transfer issues, system design, and recent research and development. While no attempt is made to describe the fuel cell itself, there is sufficient description of the fuel cell to show how it affects the fuel reformer. By focusing on the fundamentals, this book aims to be a source of information now and in the future. By avoiding time-sensitive information/analysis (e.g., economics) it serves as a single source of information for scientists and engineers in fuel processing technology. The material is presented in such a way that this book will serve as a reference for graduate level courses, fuel cell developers, and fuel cell researchers. - Chapters written by experts in each area - Extensive bibliography supporting each chapter - Detailed index - Up-to-date diagrams and full colour illustrations
Download or read book Method of Removing Hydrogen Sulfide from Gases Utilizing a Zinc Oxide Sorbent and Regenerating the Sorbent written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A spent solid sorbent resulting from the removal of hydrogen sulfide from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing metal sulfide at a temperature above 500.degree. C. to regenerate the sulfide to metal oxide or carbonate. Various metal species including the period four transition metals and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of metal sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent.
Author : László Guczi
Publisher : Springer Science & Business Media
ISBN 13 : 1461403448
Total Pages : 543 pages
Book Rating : 4.4/5 (614 download)
Download or read book Catalysis for Alternative Energy Generation written by László Guczi and published by Springer Science & Business Media. This book was released on 2012-04-17 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increase of greenhouse gases in the atmosphere and the decrease of the available amount of fossil fuels necessitate finding new alternative and sustainable energy sources in the near future. This book summarizes the role and the possibilities of catalysis in the production of new energy carriers and in the utilization of different energy sources. The main goal of this work is to go beyond those results discussed in recent literature by identifying new developments that may lead to breakthroughs in the production of alternative energy. The book discusses the use of biomass or biomass derived materials as energy sources, hydrogen formation in methanol and ethanol reforming, biodiesel production, and the utilization of biogases. Separate sections also deal with fuel cells, photocatalysis, and solar cells, which are all promising processes for energy production that depend heavily on catalysts.
Author : Miguel Jorge Bagajewicz
Publisher :
ISBN 13 :
Total Pages : 145 pages
Book Rating : 4.:/5 (112 download)
Download or read book Studies on Hot Gas Hydrogen-sulfide Removal Sorbents in Fixed-bed Reactors at High Temperatures written by Miguel Jorge Bagajewicz and published by . This book was released on 1992 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regenerable Hydrogen Chloride Removal Sorbent and Regenerable Multi-functional Hydrogen Sulfide and Hydrogen Chloride Removal Sorbent for High Temperature Gas Streams written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Regenerable hydrogen chloride removal sorbent and regenerable multi-functional hydrogen sulfide and hydrogen chloride removal sorbent for high temperature gas streams.
