High Temperature Electrochemical Polishingof H2S from Coal Gasificatioon Process Streams PDF Download
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Languages : en
Pages : 22
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Book Description
An advanced process for the separation of hydrogen sulfide from coal gasification product streams through electrochemical membrane is being developed. H2S is removed from the syngas stream, split into hydrogen, with the existing syngas, and sulfur. Past experiments dealt with removal of 1-2% H2S from gases containing only H2S, nitrogen, and simulated coal gas. The most recent experiments evaluated the polishing application using Electrochemical Membrane Separator. Removal efficiencies of over 90% were achieved.
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Category :
Languages : en
Pages : 22
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Book Description
An advanced process for the separation of hydrogen sulfide from coal gasification product streams through electrochemical membrane is being developed. H2S is removed from the syngas stream, split into hydrogen, with the existing syngas, and sulfur. Past experiments dealt with removal of 1-2% H2S from gases containing only H2S, nitrogen, and simulated coal gas. The most recent experiments evaluated the polishing application using Electrochemical Membrane Separator. Removal efficiencies of over 90% were achieved.
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Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages : 29
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This program is concerned with the development of an advanced method for the separation of hydrogen sulfides from coal gas. The process utilizes an electrochemical membrane which removes hydrogen sulfide without cooling the gas and with negligible pressure loss through the separator.
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Languages : en
Pages : 54
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Book Description
An advanced process for the separation of hydrogen sulfide from coal gasification streams through an electrochemical membrane is being perfected. H2S is removed from a synthetic gas stream, split into hydrogen, which enriches the exiting syngas, and sulfur, which is condensed downstream from an inert sweep gas stream. The process allows for continuous removal of H2S without cooling the gas stream while allowing negligible pressure loss through the separator. Moreover, the process is economically attractive due to the elimination of the 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.
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Languages : en
Pages :
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Category :
Languages : en
Pages : 35
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Book Description
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. Membrane manufacturing coupled with full-cell experimentation was the primary focus this quarter. A tape-casted zirconia membrane was developed and utilized in one full-cell experiment (run 25); run 24 utilized a fabricated membrane purchased from Zircar Corporation. Results are discussed.
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Languages : en
Pages : 20
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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. This report describes the removal of hydrogen sulfide from coal gas using an electrochemical membrane.
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Languages : en
Pages : 24
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An advanced process for the separation of hydrogen sulfide H2S from coal gasification product streams through an electrochemical membrane is developed using funds from this grant. H2S is removed from the syngas stream, split into hydrogen, which enriches the exiting syngas, 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 of 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. This quarter focused on replacing the MACOR cell housings with stainless steel, which is more industrially suitable. Three runs were attempted this quarter, with successful results achieved in Run 34. The purpose of these experiments was: (1) test the electrochemical membrane separator's ability to concentrate CO2, (2) test the electrochemical membrane separator's ability to remove H2S; and (3) test stainless steel as an alternative cell housing to MACOR as well as test nickel cathode performance at the reduced temperature.
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Category :
Languages : en
Pages : 31
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Book Description
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. This process is concerned with the removal of H2 from coal gas through an electrochemical membrane technology.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 33
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Book Description
An advanced process for the separation of hydrogen sulfide from coal gasification streams through an electrochemical membrane is being perfected. H2S is removed from a synthetic gas stream, split into hydrogen, which enriches the existing syn-gas, and sulfur, which is condensed downstream from an inert sweep gas stream. The process allows for continuous removal of H2S without cooling the gas stream while allowing negligible pressure loss through the separator. Moreover, the process is economically attractive due to the elimination of the 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. This quarter's research focused on fabricating LiCoO2 electrodes and then utilizing them in full cell experiments at 650 C. The cathode showed inefficient porosity to allow mass transfer of the extremely dilute hydrogen sulfide to the electrolyte interface.
