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Download or read book Moving-bed Sorbents written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Sorbents for High-temperature Desulfurization in Moving-bed Systems written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (684 download)
Download or read book Sorbent Development for Low-Temperature Moving-Bed Desulfurization written by and published by . This book was released on 1996 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this program, the effort is geared towards developing advanced mixed-metal oxide sorbents for desulfurization in moving-bed systems in the temperature rang 343-538°C (650-1000°F) where technical viability and process efficiency result in lower overall process costs. In addition a cost assessment and a market plan for large-scale fabrication of sorbents will be developed. As an optional task, a long-term bench-scale testing of the best moving-bed sorbent formulation will conducted. The sorbents must have chemical characteristics that permit cyclic desulfurization and regeneration over many cycles without a drastic loss of activity. The sorbents must be capable of reducing the hydrogen sulfide level in the fuel gas to less than 20 ppm in the specified temperature range and pressures in the range of 1 to 20 atmospheres. In addition, they must also have physical characteristics that are compatible with the selected reactor, e.g. pellet size/shape. This paper discusses in more detail recent developments in the fabrication and use of doped zinc titanate sorbents for moving-bed configurations at temperatures below 538°C (1000°F).
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ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (727 download)
Download or read book Enhanced Durability of High-temperature Desulfurization Sorbents for Moving-bed Applications. Base Program written by and published by . This book was released on 1991 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this contract was to identify and test fabrication methods and sorbent chemical compositions that enhance the long-term chemical reactivity and mechanical strength of zinc ferrite and other novel sorbents for moving-bed, high-temperature desulfurization of coal-derived gases. Desired properties to be enhanced for moving-bed sorbent materials are: (1) high chemical reactivity (sulfur absorption rate and total sulfur capacity), (2) high mechanical strength (pellet crush strength and attrition resistance), and (3) suitable pellet morphology (e.g., pellet size, shape, surface area, and average specific pore volume). In addition, it is desired to maintain the sorbent properties over extended cyclic use in moving- bed systems.
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ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.:/5 (645 download)
Download or read book Newspaper Clippings Related to George Washington and His Family written by and published by . This book was released on 193? with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: A volume of newspaper clippings related to Martha Washington, Mary Ball Washington and George Washington. Clippings are undated and their sources are not identified. The collection was possibly assembled on the occasion of the 1932 commemoration of the 200th anniversary of George Washington's birth.
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ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (873 download)
Download or read book Advanced Sorbent Development Program Development of Sorbents for Moving-Bed and Fluidized-Bed Applications written by and published by . This book was released on 2000 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: The integrated gasification combined cycle (IGCC) power system using high-temperature coal gas cleanup is one of the most promising advanced technologies for the production of electric power from coal in an environmentally acceptable manner. Unlike conventional low-temperature cleanup systems that require costly heat exchangers, high-temperature coal gas cleanup systems can be operated near 482-538 C (900-1000 F) or higher, conditions that are a closer match with the gasifier and turbine components in the IGCC system, thus resulting is a more efficient overall system. GE is developing a moving-bed, high-temperature desulfurization system for the IGCC power cycle in which zinc-based regenerable sorbents are currently being used as desulfurization sorbents. Zinc titanate and other proprietary zinc-based oxides are being considered as sorbents for use in the Clean Coal Technology Demonstration Program at Tampa Electric Co.'s (TECo) Polk Power Station. Under cold startup conditions at TECo, desulfurization and regeneration may be carried out at temperatures as low as 343 C (650 F), hence a versatile sorbent is desirable to perform over this wide temperature range. A key to success in the development of high-temperature desulfurization systems is the matching of sorbent properties for the selected process operating conditions, namely, sustainable desulfurization kinetics, high sulfur capacity, and mechanical durability over multiple cycles. Additionally, the sulfur species produced during regeneration of the sorbent must be in a form compatible with sulfur recovery systems, such as sulfuric acid or elemental sulfur processes. The overall objective of this program is to develop regenerable sorbents for hydrogen sulfide removal from coal-derived fuel gases in the temperature range 343-538 C (650-1000 F). Two categories of reactor configurations are being considered: moving-bed reactors and fluidized-bed (bubbling and circulating) reactors. In addition, a cost assessment and a market plan for large-scale fabrication of sorbents were developed. As an optional task, long-term bench-scale tests of the best moving-bed sorbents were conducted. Starting from thermodynamic calculations, several metal oxides were identified for potential use as hot gas cleanup sorbents using constructed phase stability diagrams and laboratory screening of various mixed-metal oxide formulations. Modified zinc titanates and other proprietary metal oxide formulations were evaluated at the bench scale and many of them found to be acceptable for operation in the target desulfurization temperature range of 370 C (700 F) to 538 C (1000 F) and regeneration temperatures up to 760 C (1400 F). Further work is still needed to reduce the batch-to-batch repeatability in the fabrication of modified zinc titanates for larger scale applications. The information presented in this Volume 1 report contains the results of moving-bed sorbent development at General Electric's Corporate Research and Development (GE-CRD). A separate Volume 2 report contains the results of the subcontract on fluidized-bed sorbent development at the Institute of Gas Technology (IGT).
Author : Ranjani V. Siriwardane
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (395 download)
Download or read book Durable Zinc Oxide Containing Sorbents for Moving Bed and Fluid-Bed Applications written by Ranjani V. Siriwardane and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (727 download)
Download or read book Enhanced Durability of High-temperature Desulfurization Sorbents for Moving-bed Applications written by and published by . This book was released on 1991 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this contract was to identify and test fabrication methods and sorbent chemical compositions that enhance the long-term chemical reactivity and mechanical strength of zinc ferrite and other novel sorbents for moving-bed, high-temperature desulfurization of coal-derived gases. Desired properties to be enhanced for moving-bed sorbent materials are: (1) high chemical reactivity (sulfur absorption rate and total sulfur capacity), (2) high mechanical strength (pellet crush strength and attrition resistance), and (3) suitable pellet morphology (e.g., pellet size, shape, surface area, and average specific pore volume). In addition, it is desired to maintain the sorbent properties over extended cyclic use in moving- bed systems.
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ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book High Temperature Flue Gas Desulfurization In Moving Beds With Regenerable Copper Based Sorbents written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to develop new and improved regenerable copper based sorbent for high temperature flue gas desulfurization in a moving bed application. The targeted areas of sorbent improvement included higher effective capacity, strength and long-term durability for improved process control and economic utilization of the sorbent.
Download or read book Long Life Moving-Bed Zinc Titanate Sorbent written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ralph T. Yang
Publisher : John Wiley & Sons
ISBN 13 : 0471462411
Total Pages : 424 pages
Book Rating : 4.4/5 (714 download)
Download or read book Adsorbents written by Ralph T. Yang and published by John Wiley & Sons. This book was released on 2003-08-01 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adsorption promises to play an integral role in several future energy and environmental technologies, including hydrogen storage, CO removal for fuel cell technology, desulfurization of transportation fuels, and technologies for meeting higher standards on air and water pollutants. Ralph Yang's Adsorbents provides a single and comprehensive source of knowledge for all commercial and new sorbent materials, presenting the fundamental principles for their syntheses, their adsorption properties, and their present and potential applications for separation and purification. Chapter topics in this authoritative, forward-looking volume include: - Formulas for calculating the basic forces or potentials for adsorption - Calculation of pore-size distribution from a single adsorption isotherm - Rules for sorbent selection - Fundamental principles for syntheses/preparation, adsorption properties, and applications of commercially available sorbents - Mesoporous molecular sieves and zeolites - ̧-complexation sorbents and their applications - Carbon nanotubes, pillared clays, and polymeric resins Yang covers the explosion in the development of new nanoporous materials thoroughly, as the adsorption properties of some of these materials have remained largely unexplored. The whole of this book benefits from the new adsorbent designs made possible by the increase in desktop computing and molecular simulation, making Adsorbents useful to both practicing laboratories and graduate programs. Ralph Yang's comprehensive study contributes significantly to the resolution of separation and purification problems by adsorption technologies.
Author : Avelino Nunez-Delgado
Publisher : Elsevier
ISBN 13 : 0323851843
Total Pages : 778 pages
Book Rating : 4.3/5 (238 download)
Download or read book Sorbents Materials for Controlling Environmental Pollution written by Avelino Nunez-Delgado and published by Elsevier. This book was released on 2021-02-16 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sorbents Materials for Controlling Environmental Pollution: Current State and Trends presents data on current use and future trends regarding sorbent materials employed against soil, water, and air pollution. The book is organized first by use and research for a variety of geographic areas. It will then focus on different sorbent materials and their uses, followed by various pollutants and their management. Including updated and extensive data from an assortment of sources, the book is organized to be very accessible, including with an interactive table to help identify the results of appropriate sorbents for each environmental compartment. The growing concern regarding soil, water and air pollution all over the world has implications for climate change and sustainability, making Sorbents Materials for Controlling Environmental Pollution: Current State and Trends an important reference for environmental scientists to identify tools for moving forward in solving these problems. - Includes data and examples from various geographic locations worldwide - Synthesizes data for a variety of sorbent material from different sources - Presents data for various kinds of pollutants across environmental spheres, including soil, water, and air - Utilizes an interactive table for quicker access to data and results
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ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (685 download)
Download or read book Enhanced Durability of High-temperature Desulfurization Sorbents for Moving-bed Applications. Option 2 Program written by and published by . This book was released on 1993 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most advantageous configurations of the integrated gasification combined cycle (IGCC) power system is coupling it with a hot gas cleanup for the more efficient production of electric power in an environmentally acceptable manner. In conventional gasification cleanup systems, closely heat exchangers are necessary to cool down the fuel gases for cleaning, sometimes as low as 200--300°F, and to reheat the gases prior to injection into the turbine. The result is significant losses in efficiency for the overall power cycle. High-temperature coal gas cleanup in the IGCC system can be operated near 1000°F or higher, i.e., at conditions compatible with the gasifier and turbine components, resulting is a more efficient overall system. GE is developing a moving-bed, high-temperature desulfurization system for IGCC power systems in which mixed-metal oxides are currently being used as desulfurization sorbents. The objective of this contract is to identify and test fabrication methods and sorbent chemical compositions that enhance the long-term chemical reactivity and mechanical durability of zinc ferrite and other novel sorbents for moving-bed, high-temperature desulfurization of coal-derived gases. Zinc ferrite was studied under the base program of this contract. In the next phase of this program novel sorbents, particularly zinc titanate-based sorbents, are being studied under the remaining optional programs. This topical report summarizes only the work performed under the Option 2 program. In the course of carrying out the program, more than 25 zinc titanate formulations have been prepared and characterized to identify formulations exhibiting enhanced properties over the baseline zinc titanate formulation selected by the US Department of Energy.
Download or read book Simulated Moving Bed System for CO.sub. 2 Separation, and Method of Same written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A system and method for separating and/or purification of CO.sub. 2 gas from a CO.sub. 2 feed stream is described. The system and method include a plurality of fixed sorbent beds, adsorption zones and desorption zones, where the sorbent beds are connected via valve and lines to create a simulated moving bed system, where the sorbent beds move from one adsorption position to another adsorption position, and then into one regeneration position to another regeneration position, and optionally back to an adsorption position. The system and method operate by concentration swing adsorption/desorption and by adsorptive/desorptive displacement.
Download or read book Circulating Moving Bed System for CO.sub. 2 Separation, and Method of Same written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A circulating moving bed and process for separating a carbon dioxide from a gas stream is disclosed. The circulating moving bed can include an adsorption reactor and a desorption reactor, and a sorbent that moves through the two reactors. The sorbent can enter the adsorptive reactor and one end and move to an exit point distal to its entry point, while a CO.sub. 2 feed stream can enter near the distal point and move countercurrently through the sorbent to exit at a position near the entry point of the sorbent. The sorbent can adsorb the CO.sub. 2 by concentration swing adsorption and adsorptive displacement. The sorbent can then transfer to a regeneration reactor and can move countercurrently against a flow of steam through the regeneration reactor. The sorbent can be regenerated and the carbon dioxide recaptured by desorbing the carbon dioxide from the sorbent using concentration swing desorption and desorptive displacement with steam.
Download or read book Rotary Moving Bed for CO.sub. 2 Separation and Use of Same written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A rotary moving bed and process for separating a carbon dioxide from a gas stream is disclosed. The rotary moving bed can have a rotational assembly rotating on a vertical axis, and a plurality of sorbent cells positioned horizontally to the axis of rotation that fills a vertical space in the moving bed, where the sorbent cells adsorb the carbon dioxide by concentration swing adsorption and adsorptive displacement. The sorbent can be regenerated and the carbon dioxide recaptured by desorbing the carbon dioxide from the sorbent using concentration swing adsorption and desorptive displacement with steam. The gas flows in the system flow in a direction horizontal to the axis of rotation and in a direction opposite the rotational movement of the sorbent cells.
Author : Aysel T. Atimtay
Publisher : Springer Science & Business Media
ISBN 13 : 3642589774
Total Pages : 409 pages
Book Rating : 4.6/5 (425 download)
Download or read book Desulfurization of Hot Coal Gas written by Aysel T. Atimtay and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Economic and environmental requirements for advanced power generating systems demand the removal of corrosive and other sulfurous compounds from hot coal gas. After a brief account of the world energy resources and an overview of clean coal technologies, a review of regenerable metal oxide sorbents for cleaning the hot gas is provided. Zinc oxide, copper oxide, calcium oxide, manganese oxide based as well as supported and mixed metal oxide sorbents are treated. Performance analysis of these sorbents, effects of various parameters on the desulfurization efficiency, kinetics of sulfidation and regeneration reactions, sulfiding and regeneration mechanisms are discussed. Two chapters present recent results in the direct production of elemental sulfur from regeneration or SO2-rich gases.
