Download or read book High temperature H2S removal Processes Using Limestones written by and published by . This book was released on 1993 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process under investigation involves removal of H2S from the coal gas by sorption into a moving bed of limestone (or lime) particles. NH3 in the coal gas will be broken down by catalysis and gasifier fines will be removed by cycloning and by filtration by the moving granular bed. This project focuses on developing the necessary description of the kinetics of the reaction of H2S with limestone, and in particular the evolution of the structure of the solid during the course of the reaction. A differential tube quartz reactor system for studying these reactions in the temperature range of interest has been built. Since studies at gasification pressures would require a more expensive apparatus, this study is confined to atmospheric pressure.

Download or read book High Temperature H2S Removal Using Limestones written by and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project is exploring the technical and economic feasibility of using limestone in a high determine process for cleaning coal gas prior to combustion in a gas turbine. In one version of the process the coal gas would pass counter-currently through a nearly-isothermal, moving bed of limestone that would serve to remove particulates (by filtration), and hydrogen sulfide (by chemisorption), and ammonia (by catalysis). Alternative process configurations include the use of limestone in a cocurrently moving bed, in a fluidized bed, or in an entrained flow sorption system. The objectives of this research have been to define the range of temperatures at which these goals can best be realized at a given pressure, to determine the effect of the magnesium content of the limestone on sulfidation kinetics and calcium utilization, to use the kinetic data to model the various types of sorption systems, and to develop a process for converting calcium sulfide to elemental sulfur and calcium carbonate.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Development of Processes for the Recovery of Sulfur from Acid Gases Part 1 Development of a High temperature Process for Removal of H2S from Coal Gas Using Limestone Thermodynamic and Kinetic Considerations Part 2 Development of a Zero emissions Process for Recovery of Sulfur from Acid Gas Streams written by and published by . This book was released on 1993 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Limestone can be used more effectively as a sorbent for H2S in high-temperature gas-cleaning applications if it is prevented from undergoing calcination. Sorption of H2S by limestone is impeded by sintering of the product CaS layer. Sintering of CaS is catalyzed by CO2, but is not affected by N2 or H2. The kinetics of CaS sintering was determined for the temperature range 750--900°C. When hydrogen sulfide is heated above 600°C in the presence of carbon dioxide elemental sulfur is formed. The rate-limiting step of elemental sulfur formation is thermal decomposition of H2S. Part of the hydrogen thereby produced reacts with CO2, forming CO via the water-gas-shift reaction. The equilibrium of H2S decomposition is therefore shifted to favor the formation of elemental sulfur. The main byproduct is COS, formed by a reaction between CO2 and H2S that is analogous to the water-gas-shift reaction. Smaller amounts of SO2 and CS2 also form. Molybdenum disulfide is a strong catalyst for H2S decomposition in the presence of CO2. A process for recovery of sulfur from H2S using this chemistry is as follows: Hydrogen sulfide is heated in a high-temperature reactor in the presence of CO2 and a suitable catalyst. The primary products of the overall reaction are S2, CO, H2 and H2O. Rapid quenching of the reaction mixture to roughly 600°C prevents loss Of S2 during cooling. Carbonyl sulfide is removed from the product gas by hydrolysis back to CO2 and H2S. Unreacted CO2 and H2S are removed from the product gas and recycled to the reactor, leaving a gas consisting chiefly of H2 and CO, which recovers the hydrogen value from the H2S. This process is economically favorable compared to the existing sulfur-recovery technology and allows emissions of sulfur-containing gases to be controlled to very low levels.

Download or read book H2S removal Processes for Low BTU Coal Gas written by M. S. Edwards and published by . This book was released on 1979 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low BTU Gasification High Temperature low Temperature H2S Removal Comparison Effect on Overall Thermal Efficiency in a Combined Cycle Power Plant written by R. A. Ashworth and published by . This book was released on 1973 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy a Continuing Bibliography with Indexes written by and published by . This book was released on 1980 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fossil Energy Update written by and published by . This book was released on 1976 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Process Design and Integration written by Robin Smith and published by John Wiley & Sons. This book was released on 2016-08-02 with total page 923 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a highly regarded author with industrial and academic experience, this new edition of an established bestselling book provides practical guidance for students, researchers, and those in chemical engineering. The book includes a new section on sustainable energy, with sections on carbon capture and sequestration, as a result of increasing environmental awareness; and a companion website that includes problems, worked solutions, and Excel spreadsheets to enable students to carry out complex calculations.

Download or read book Pre combustion Carbon Dioxide Capture Materials written by Qiang Wang and published by Royal Society of Chemistry. This book was released on 2018-08-22 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to the different inorganic adsorbents/sorbents used in pre-combustion carbon dioxide capture.

Download or read book Annual Report written by United States. Office of Coal Research and published by . This book was released on 1973 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coal Technology written by United States. Office of Coal Research and published by . This book was released on 1973 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by United States. Office of Coal Research and published by . This book was released on 1970 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report Office of Coal Research written by United States. Office of Coal Research and published by . This book was released on 1969 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Process for Cleaning and Removal of Sulfur Compounds from Low Btu Gases written by L. H. Moore and published by . This book was released on 1974 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Inorganic Chemistry Vollume II written by and published by Krishna Prakashan Media. This book was released on with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Biomass Gasification written by Steffen Heidenreich and published by Academic Press. This book was released on 2016-06-07 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Biomass Gasification: New Concepts for Efficiency Increase and Product Flexibility provides a thorough overview on new concepts in biomass gasification and consolidated information on advances for process integration and combination, which could otherwise only be gained by reading a high number of journal publications. Heidenreich, Müller and Foscolo, highly respected experts in this field, start their exploration with the compact UNIQUE reactor, gasification and pyrolysis, gasification and combustion, and catalysts and membranes. The authors then examine biomass pre-treatment processes, taking into account the energy balance of the overall conversion process, and look into oxygen-steam gasification and solutions for air separation, including new options for integration of O2-membranes into the gasifier. Several polygeneration strategies are covered, including combined heat and power (CHP) production with synthetic natural gas (SNG), biofuels and hydrogen, and new cutting-edge concepts, such as plasma gasification, supercritical water gasification, and catalytic gasification, which allows for insights on the future technological outlook of the area. This book is then a valuable resource for industry and academia-based researchers, as well as graduate students in the energy and chemical sectors with interest in biomass gasification, especially in areas of power engineering, bioenergy, chemical engineering, and catalysis. Explores state-of-the-art technologies that allow for greater efficiency and flexibility in gasification, including process integration, combination, and polygeneration strategies Consolidates information that was, up until now, scattered among several sources, including journal articles Provides a valuable resource for industry and academia-based researchers, as well as graduate students in the energy and chemical sectors with interest in biomass gasification, especially in areas of power engineering, bioenergy, chemical engineering, and catalysis