Separation of a sour syngas stream

Apparatus for separating a feed stream, formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and comprising at least H2S, CO2 and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), the apparatus comprising:

• a pressure swing adsorption system (the “H2/CO-PSA system”) for separating the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S;
• a conduit arrangement for introducing the feed stream into the H2/CO-PSA system;
• a conduit arrangement for withdrawing the H2/CO product stream from the H2/CO-PSA system;
• an H2S removal system, for processing said stream enriched in CO2 and H2S to provide a stream enriched in CO2 and depleted in H2S;
• a conduit arrangement for withdrawing the stream enriched in CO2 and H2S from the H2/CO-PSA system and introducing the stream into the H2S removal system;
• a further separation system, for separating said stream enriched in CO2 and depleted in H2S to provide the CO2 product stream and a stream comprising H2 or H2 and CO;
• a conduit arrangement for withdrawing the stream enriched in CO2 and depleted in H2S from the H2S removal system and introducing the stream into the further separation system;
• a conduit arrangement for withdrawing the CO2 product stream from the further separation system;
• and
• a conduit arrangement for withdrawing the stream comprising H2 or H2 and CO from the further separation system.

Apparatus for separating a feed stream, formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and comprising at least H2S, CO2 and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), the apparatus comprising:

• an H2S removal system, for processing the feed stream to provide a stream depleted in H2S;
• a conduit arrangement for introducing the feed stream into the H2S removal system;
• a pressure swing adsorption system (the “H2/CO-PSA system”) for separating said stream depleted in H2S to provide the H2/CO product stream and a stream enriched in CO2 and depleted in H2S;
• a conduit arrangement for withdrawing the stream depleted in H2S from the H2S removal system and introducing the stream into the H2/CO-PSA system;
• a conduit arrangement for withdrawing the H2/CO product stream from the H2/CO-PSA system;
• a further separation system, for separating said stream enriched in CO2 and depleted in H2S to provide the CO2 product stream and a stream comprising H2 or H2 and CO;
• a conduit arrangement for withdrawing the stream enriched in CO2 and depleted in H2S from the H2/CO-PSA system and introducing the stream into the further separation system;
• a conduit arrangement for withdrawing the CO2 product stream from the further separation system;
• and
• a conduit arrangement for withdrawing the stream comprising H2 or H2 and CO from the further separation system.

Apparatus for separating a feed stream, formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and comprising at least H2S, CO2 and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), the apparatus comprising:

• a pressure swing adsorption system (the “H2/CO-PSA system”) for separating the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S;
• a conduit arrangement for introducing the feed stream into the H2/CO-PSA system;
• a conduit arrangement for withdrawing the H2/CO product stream from the H2/CO-PSA system;
• a further separation system, for separating said stream enriched in CO2 and H2S to provide a stream further enriched in CO2 and H2S and a stream comprising H2 or H2 and CO;
• a conduit arrangement for withdrawing the stream enriched in CO2 and H2S from the H2/CO-PSA system and introducing the stream into the further separation system;
• a conduit arrangement for withdrawing the stream comprising H2 or H2 and CO from the further separation system;
• an H2S removal system, for processing said stream further enriched in CO2 and H2S to provide the CO2 product stream;
• a conduit arrangement for withdrawing the stream further enriched in CO2 and H2S from the further separation system and introducing the stream into the H2S removal system;
• and
• a conduit arrangement for withdrawing the CO2 product stream from the H2S removal system.