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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.
Content Level »Research
Keywords »Absorption - Chemische Technik - Energieproduktion - Leuchtgas - Metalloxidsorbentien - chemical engineering - coal gas - desulfurization - energy production - environment - metal oxide sorbents - thermodynamics
World Energy Resources, Their Use and the Environment.- Overview of Clean Coal Gas Technologies and Current Status of the Air Blown Gasification Cycle.- Assessment of Coal Gasification Processes - Relevance to Sorbent Development.- Effects of Process Conditions on Thermodynamics of Gasification.- Application of IGCC Technology to Power Generation.- Hot Gas Cleaning - An Overview.- Survey of Desulfurization Processes for Coal Gas.- Removal of H2S from Coal Gas: Effect of Various Parameters on the Desulfurization Efficiency.- Hot Gas Cleaning, Sulfiding Mechanisms in Absorption of H2S by Solids.- Kinetics of Sulfidation Reactions Between H2S and Bulk Oxide Sorbents.- Performance Analysis of ZnO-Based Sorbents in Removal of H2S From Fuel Gas.- Performance of Manganese-Based Sorbents in High Temperature Coal Gas Desulfurization.- In-situ Desulfurization of Coal Gas with CaO-Based Sorbents.- Stabilization and Regeneration of Spent Sorbents.- Mixed Metal Oxide Sorbents.- Development of Supported Sorbents for H2S Removal from Fuel Gas.- Regeneration of Sulfided Sorbents and Direct Production of Elemental Sulfur.- Elemental Sulfur Recovery from SO2-Rich Streams.- Experience of Regenerable Sulfur Sorbents in Real Fuel Gas Systems.-