US Patent 7550030 Process and apparatus to recover high purity carbon dioxide

Patent 7550030 was granted and assigned to Praxair on June, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Praxair

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7550030

Date of Patent

June 23, 2009

Patent Application Number

11395138

Date Filed

April 3, 2006

Patent Primary Examiner

‌

Frank M Lawrence, Jr.

Patent 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 CO2 VPSA unit can be at super ambient pressure. The CO2 VPSA unit produces three streams, a H2-enriched stream, a H2-depleted stream and a CO2 product stream. When the CO2 VPSA unit is installed between an SMR/shift reactor and a H2 PSA unit, hydrogen recovery is expected to be increased by extracting CO2, thereby increasing hydrogen partial pressure in the H2 PSA feed. The recovered CO2 can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).