Invention Grant
US07740688B2 Process and apparatus for carbon dioxide recovery 失效
二氧化碳回收的方法和装置

  • Patent Title: Process and apparatus for carbon dioxide recovery
  • Patent Title (中): 二氧化碳回收的方法和装置
  • Application No.: US11527015
    Application Date: 2006-09-26
  • Publication No.: US07740688B2
    Publication Date: 2010-06-22
  • Inventor: Ravi Kumar
  • Applicant: Ravi Kumar
  • Applicant Address: US CT Danbury
  • Assignee: Praxair Technology, Inc.
  • Current Assignee: Praxair Technology, Inc.
  • Current Assignee Address: US CT Danbury
  • Agent Donald T. Black
  • Main IPC: B01D53/02
  • IPC: B01D53/02
Process and apparatus for carbon dioxide recovery
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 stream from the CO2 VPSA unit, normally used as fuel, is recycled as feed to increase CO2 recovery. The recovered CO2 can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).
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