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.
Download or read book High temperature H2S Removal from IGCC Coarse Gas written by 吴江 and published by . This book was released on 2018 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book High Temperature H2S Removal from Coal Gasification Products written by Robert Allen Bradway and published by . This book was released on 1974 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 REMOVAL OF H2S FROM COAL GASIFICATION PROCESS STREAMS USING AN ELECTROCHEMICAL MEMBRANE SYSTEM written by and published by . This book was released on 2003 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: A bench scale set-up was constructed to test the cell performance at 600-700 C and 1 atm. The typical fuel stream inlet proportions were 34% CO, 22% CO2, 35% H2, 8% H2O, and 450-2000 ppm H2S. The fundamental transport restrictions for sulfur species in an electrochemical cell were examined. Temperature and membrane thickness were varied to examine how these parameters affect the maximum flux of H2S removal. It was found that higher temperature allows more sulfide species to enter the electrolyte, thus increasing the sulfide flux across the membrane and raising the maximum flux of H2S removal. The results identify sulfide diffusion across the membrane as the rate-limiting step in H2S removal. The maximum H2S removal flux of 1.1 x 10-6 gmol H2S min−1 cm−2 (or 3.5 mA cm−2) was obtained at 650 C, with a membrane that was 0.9 mm thick, 36% porous, and had an estimated tortuosity of 3.6. Another focus of this thesis was to examine the stability of cathode materials in full cell trials. A major hurdle that remains in process scale-up is cathode selection, as the lifetime of the cell will depend heavily on the lifetime of the cathode material, which is exposed to very sour gas. Materials that showed success in the past (i.e. cobalt sulfides and Y{sub 0.9}Ca{sub 0.1}FeO3) were examined but were seen to have limitations in operating environment and temperature. Therefore, other novel metal oxide compounds were studied to find possible candidates for full cell trials. Gd2TiMoO-- and La{sub 0.7}Sr{sub 0.3}VO3 were the compounds that retained their structure best even when exposed to high H2S, CO2, and H2O concentrations.
Download or read book Studies on Hot Gas H2S Removal Sorbents in Fixed bedreactorsat High Temperatures written by M. J. Bagajewicz and published by . This book was released on 1990 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Temperature Electrochemical Separation of H2S from Coal Gasification Process Streams Quarterly Progress Report January 1 1992 March 31 1992 written by and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced process for the separation of hydrogen sulfide from coal gasification product streams through an electrochemical membrane is being developed. H2S is removed from the syn-gas stream, split into hydrogen, which enriches the syn-gas, and sulfur, which can be condensed from an inert gas sweep stream. The process allows removal of H2S without cooling the gas stream and with negligible pressure loss through the separator. The process is economically attractive by the lack of adsorbents and the lack of a Claus process for sulfur recovery. Research conducted during the present quarter is highlighted, with an emphasis on progress towards the goal of an economically viable H2S removal technology for use in coal gasification facilities providing polished fuel for co-generation coal fired electrical power facilities and Molten Carbonate Fuel Cell electrical power facilities. Polishing application of this technology to coal gasification synthesis gas has been demonstrated with H2S removals as high as 89.1% recorded. No successful runs with stainless steel housings have yet been achieved. However, since stoichiometric CO2 removal with stainless steel housings has been achieved, H2S removal is achievable.
Download or read book High Temperature Electrochemical Separation of H2S from Coal Gasification Process Streams Quarterly Progress Report January 1 1994 March 31 1994 written by and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: An electrochemical membrane separation system for removing H2S from coal gasification product steams is the subject of this investigation. The high operating temperature, flow-through design, and capability of selective H2S removal and direct production of elemental sulfur offered by this process provide several advantages over existing and developmental H2S removal technologies. Two experiments (Run {number_sign}17 & {number_sign}18) examining the removal capability of the EMS with cobalt cathode were performed this quarter. The focus dealt with H2S removal as well as impeding hydrogen cross-over from the process gas side (cathode) of the membrane to the sweep gas side (anode).
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 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.
Download or read book Gas Cleaning at High Temperatures written by R. Clift and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2nd International Symposium
Download or read book High Temperature Electrochemical Polishing of H2S from Coal Gasification Process Streams Quarterly Progress Report January 1 1996 March 31 1996 written by and published by . This book was released on 1996 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal may be used to generate electrical energy by any of several processes, most of which involve combustion or gasification. Combustion in a coal-fired boiler and power generation using a steam- cycle is the conventional conversion method; however, total energy conversion efficiencies for this type of process are only slightly over 30%. Integration of a gas-cycle in the process (combined cycle) may increase the total conversion efficiency to 40%. Conversion processes based on gasification offer efficiencies above 50%. H2S is the predominant gaseous contaminant in raw coal gas. Problems arise due to the corrosive nature of H2S on metal components contained in these cycles. Because of this, H2S concentrations must be reduced to low levels corresponding to certain power applications. An advanced process for the separation of hydrogen sulfide (H2S) from coal gasification product streams through an electrochemical membrane is being developed using funds from this grant. Past experiments using this concept dealt with identifying removal of 1-2% H2S from gases containing only H2S in N2, simulated natural gas, and simulated coal gas. Other goals include optimization of cell materials capable of improving cell performance. Once cell materials are defined, cell experiments determining maximum removal capabilities and current efficiencies will be conducted. Also, a model theoretically describing the preferred reduction of H2S, the transport of S2−, and the competing transport of CO2 will be investigated. The model should identify the maximum current efficiency for H2S removal, depending on variables such as flow rate, temperature, current application, and the total cell potential. 21 refs., 10 figs., 9 tabs.
Download or read book High Temperature Electrochemical Polishing of H2S from Coal Gasification Process Stream Quarterly Progress Report January 1 1995 March 31 1995 written by and published by . This book was released on 1995 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced process for the separation of hydrogen sulfide (H2S) from coal gasification product streams through an electrochemical membrane is being developed. H2S is removed from the syn-gas stream, split into hydrogen, which enriches the exiting syn-gas, and sulfur, which is condensed from an inert sweep gas stream. The process allows removal of H2S without cooling the gas stream and with negligible pressure loss through the separator. The process is made economically attractive by the lack of need for a Claus process for sulfur recovery. To this extent the project presents a novel concept for improving utilization of coal for more efficient power generation. Past experiments using this concept dealt with identifying removal of 1--2% H2S from gases containing only H2S in N2, simulated natural gas, and simulated coal gas. Data obtained from these experiments resulted in extended studies into electrode kinetics and electrode stability in molten melts. The most recent experiments evaluated the polishing application (removal Of H2S below 10 ppm) using the Electrochemical Membrane Separator (EMS). H2S removal efficiencies over 90% were achieved at these stringent conditions of low H2S concentrations proving the technologies polishing capabilities. Other goals include optimization of cell materials capable of improving cell performance. Once cell materials are defined, cell experiments determining maximum removal capabilities and current efficiencies will be conducted. Also, a model theoretically describing the preferred reduction of H2S, the transport of S2−, and the competing transport of CO2 will be investigated. The model should identify the maximum current efficiency for H2S removal, depending on variables such as flow rate, temperature, current application, and the total cell potential.
Download or read book High Temperature Electrochemical Separation of H Sub 2 S from Coal Gasification Process Streams written by and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced process for the separation of hydrogen sulfide from coal gasification product streams through an electrochemical membrane is being developed. H2S is removed from the syn-gas stream, split into hydrogen, which enriches the syn-gas, and sulfur, which can be condensed from an inert gas sweep stream. The process allows removal of H2S without cooling the gas stream and with negligible pressure loss through the separator. The process is economically attractive by the lack of adsorbents and the lack of a Claus process for sulfur recovery. Research conducted during the present quarter is highlighted, with an emphasis on progress towards the goal of an economically viable H2S removal technology for use in coal gasification facilities providing polished fuel for co-generation coal fired electrical power facilities and Molten Carbonate Fuel Cell electrical power facilities. Polishing application of this technology to coal gasification synthesis gas has been demonstrated with H2S removals as high as 89.1% recorded. No successful runs with stainless steel housings have yet been achieved. However, since stoichiometric CO2 removal with stainless steel housings has been achieved, H2S removal is achievable.
Download or read book Utilization of Low Cost Sorbents for H2S and HCl Removal from High Temperature Coal Gas written by Keyur Pandya and published by . This book was released on 2001 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
