摘要:
A gaseous mixture (101), comprising CO 2 , H 2 , H 2 S and optionally CO, is separated into an H 2 or H 2 and CO product stream (103) (H 2 /CO product stream), and a CO 2 enriched stream (104) containing at least one combustible component selected from H 2 S, H 2 , CO and any additional combustible components present in the gaseous mixture. A support fuel stream (109), comprising one or more combustible components, is combusted to form a stable flame, and the CO 2 enriched stream and flame are contacted in the presence of sufficient O 2 to combust all or substantially all of the combustible component(s) present in said CO 2 enriched stream. A CO 2 product stream is formed from said combustion effluent (113). The support fuel stream may be generated from the process of generating or separating the gaseous mixture or from the H 2 /CO product stream. Where the CO 2 enriched stream contains H 2 S, the support fuel stream may also be a stream obtained off-site that comprises H 2 S.
摘要:
A gaseous mixture (101), comprising CO 2 , H 2 , H 2 S and optionally CO, is separated into an H 2 or H 2 and CO product stream (103) (H 2 /CO product stream), and a CO 2 enriched stream (104) containing at least one combustible component selected from H 2 S, H 2 , CO and any additional combustible components present in the gaseous mixture. A support fuel stream (109), comprising one or more combustible components, is combusted to form a stable flame, and the CO 2 enriched stream and flame are contacted in the presence of sufficient O 2 to combust all or substantially all of the combustible component(s) present in said CO 2 enriched stream. A CO 2 product stream is formed from said combustion effluent (113). The support fuel stream may be generated from the process of generating or separating the gaseous mixture or from the H 2 /CO product stream. Where the CO 2 enriched stream contains H 2 S, the support fuel stream may also be a stream obtained off-site that comprises H 2 S.
摘要:
NO 2 may be removed from a carbon dioxide feed gas comprising NO x and at least one "non-condensable" gas as contaminants by passing the feed gas at a first elevated pressure through a first adsorption system that selectively adsorbs at least NO 2 to produce at least substantially N0 2 -free carbon dioxide gas. The adsorption system is at least partially regenerated using a carbon dioxide-rich gas recovered from the substantially NO 2 -free carbon dioxide gas after purification. The invention has particular application in removing NO x and water from flue gas generated by oxyfuel combustion.
摘要:
A feed gas comprising CO 2 , H 2 S and H 2 is treated to produce an H 2 -enriched product and an H 2 S-lean, CO 2 product. The feed gas is separated to provide the H 2 -enriched product and a stream of sour gas. The stream of sour gas is divided into two parts, one of which is processed in an H 2 S removal system to form one or more streams of sweetened gas, and the other of which bypasses the H 2 S removal system, the stream(s) of sweetened gas and the sour gas bypassing the H 2 S removal system then being recombined to form the H 2 S-lean, CO 2 product gas. The division of the sour gas between being sent to and bypassing the H 2 S removal system is adjusted responsive to changes in the H 2 S content of the sour gas, so as to dampen or cancel the effects of said changes on the H 2 S content of the H 2 S-lean, CO 2 product gas.
摘要:
NO 2 may be removed from a carbon dioxide feed gas comprising NO x and at least one "non-condensable" gas as contaminants by passing the feed gas at a first elevated pressure through a first adsorption system that selectively adsorbs at least NO 2 to produce at least substantially N0 2 -free carbon dioxide gas. The adsorption system is at least partially regenerated using a carbon dioxide-rich gas recovered from the substantially NO 2 -free carbon dioxide gas after purification. The invention has particular application in removing NO x and water from flue gas generated by oxyfuel combustion.
摘要:
NO 2 may be removed from a carbon dioxide feed gas comprising NO x and at least one "non-condensable" gas as contaminants by passing the feed gas at a first elevated pressure through a first adsorption system that selectively adsorbs at least NO 2 to produce at least substantially N0 2 -free carbon dioxide gas. The adsorption system is at least partially regenerated using a carbon dioxide-rich gas recovered from the substantially NO 2 -free carbon dioxide gas after purification. The invention has particular application in removing NO x and water from flue gas generated by oxyfuel combustion.
摘要:
A feed gas comprising CO 2 , H 2 S and H 2 is treated to produce an H 2 -enriched product and a CO 2 product. The feed gas is separated by pressure swing adsorption to provide a stream of the H 2 -enriched product, and two streams of sour gas depleted in H 2 and enriched in H 2 S and CO 2 relative to the feed gas. One of the streams of sour gas is processed in an H 2 S to elemental sulfur conversion system, in which H 2 S in the sour gas is converted to elemental sulfur order to obtain a stream of sweetened gas, from which the CO 2 product is formed. The other of said streams of sour gas is processed in an oxidation system, in which H 2 S in the sour gas is oxidized to SO x (SO 2 and SO 3 ), the SO 2 from the oxidation effluent or sulfuric/sulfurous acid obtained therefrom being introduced into the H 2 S to elemental sulfur conversion system as a reagent.
摘要:
A feed stream, comprising hydrogen sulphide (H 2 S), carbon dioxide (CO 2 ), hydrogen (H 2 ) and, optionally, carbon monoxide (CO), is separated into at least a CO 2 product stream and an H 2 or H 2 and CO product stream. The stream is separated using a pressure swing adsorption system, an H 2 S removal system and a further separation system, which systems are used in series to separate the stream. The method has particular application in the separation of a sour (i.e. sulphur containing) syngas, as for example produced from the gasification of solid or heavy liquid carbonaceous feedstock.