Gas separation: processes – Solid sorption – Including reduction of pressure
Reexamination Certificate
2006-04-03
2009-11-17
Hopkins, Robert A (Department: 1797)
Gas separation: processes
Solid sorption
Including reduction of pressure
C095S103000, C095S139000, C095S148000
Reexamination Certificate
active
07618478
ABSTRACT:
The present invention generally relates to vacuum pressure swing adsorption (VPSA) processes and apparatus to recover carbon dioxide having a purity of approximately ≧80 mole percent from streams containing at least carbon dioxide and hydrogen (e.g., syngas). The feed to the CO2VPSA can be at super ambient pressure. The CO2VPSA unit produces two streams, a H2-enriched stream and a CO2product stream. The process cycle steps are selected such that there is minimal or no hydrogen losses from the process. The recovered CO2can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).
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Hopkins Robert A
Pace Salvatore P.
Praxair Technology Inc.
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