Process and apparatus to recover high purity carbon dioxide

Details Process and apparatus to recover high purity carbon dioxide Process and apparatus to recover high purity carbon dioxide

2006-04-03

2009-06-23

Lawrence, Frank M (Department: 1797)

Gas separation: processes

Solid sorption

Including reduction of pressure

C095S101000, C095S103000, C095S139000

Reexamination Certificate

active

07550030

ABSTRACT:
The present invention generally relates to vacuum pressure swing adsorption (VPSA) processes and apparatus to recover carbon dioxide having a purity of approximately ≧90 mole % from streams containing at least carbon dioxide and hydrogen (e.g., syngas). The feed to the CO2VPSA unit can be at super ambient pressure. The CO2VPSA unit produces three streams, a H2-enriched stream, a H2-depleted stream and a CO2product stream. When the CO2VPSA unit is installed between an SMR/shift reactor and a H2PSA unit, hydrogen recovery is expected to be increased by extracting CO2, thereby increasing hydrogen partial pressure in the H2PSA feed. The recovered CO2can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).

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