The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2010
Filed:
Sep. 26, 2006
Ravi Kumar, Williamsville, NY (US);
Ravi Kumar, Williamsville, NY (US);
Praxair Technology, Inc., Danbury, CT (US);
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 COVPSA unit can be at super ambient pressure. The COVPSA unit produces three streams, a H-enriched stream, a H-depleted stream and a COproduct stream. When the COVPSA unit is installed between an SMR/shift reactor and a HPSA unit, hydrogen recovery is expected to be increased by extracting CO, thereby increasing hydrogen partial pressure in the HPSA feed. The stream from the COVPSA unit, normally used as fuel, is recycled as feed to increase COrecovery. The recovered COcan be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).