Invention Grant
US09409120B2 Hybrid process using a membrane to enrich flue gas CO2 with a solvent-based post-combustion CO2 capture system
有权
使用膜的混合工艺利用溶剂型后燃烧二氧化碳捕集系统来丰富烟道气CO2
- Patent Title: Hybrid process using a membrane to enrich flue gas CO2 with a solvent-based post-combustion CO2 capture system
- Patent Title (中): 使用膜的混合工艺利用溶剂型后燃烧二氧化碳捕集系统来丰富烟道气CO2
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Application No.: US14591392Application Date: 2015-01-07
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Publication No.: US09409120B2Publication Date: 2016-08-09
- Inventor: Kunlei Liu , Reynolds A. Frimpong , Kun Liu
- Applicant: University of Kentucky Research Foundation
- Applicant Address: US KY Lexington
- Assignee: THE UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
- Current Assignee: THE UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
- Current Assignee Address: US KY Lexington
- Agency: King & Schickli, PLLC
- Main IPC: B01D53/22
- IPC: B01D53/22 ; B01D53/14 ; F01K23/06

Abstract:
A process for recovery of CO2 from a post-combustion gas includes pre-concentrating a CO2 component of the post-combustion flue gas by passing the post-combustion gas through a CO2-selective membrane module to provide a CO2-enriched permeate stream and a CO2-lean reject stream. Next, in a CO2 absorber, both the CO2-enriched permeate stream and CO2 lean reject stream, fed to separate feed locations on the CO2 absorber, are contacted with a scrubbing solvent to absorb CO2 and provide a carbon-rich scrubbing solvent. Finally, absorbed CO2 is stripped from the carbon-rich scrubbing solvent by a two-stage CO2 stripping system. The CO2-selective membrane may be a high flux, low pressure drop, low CO2 selectivity membrane. The two stage stripping system includes a primary CO2 stripping column for stripping CO2 from the carbon-rich scrubbing solvent exiting the CO2 absorber, and a secondary CO2 stripping column for stripping CO2 from a carbon-lean scrubbing solvent exiting the primary CO2 stripping column. Apparatus for CO2 removal from post-combustion gases in a pulverized coal power plant incorporating the described processes are described.
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