Single absorber vessel to capture CO2

US8784761B2 · kind B2 · utility

Assignee

• ALSTOM Technology Ltd · CH

Inventors

• Sanjay Kumar Dube · Knoxville, US
• Rameshawar S. Hiwale · Knoxville, US
• Peter Ulrich Koss · Zollikon, CH
• David J. Muraskin · Knoxville, US

Key dates

• Filing date: Nov 20, 2009
• Grant date: Jul 22, 2014
• Expiry date: Nov 11, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A system for removing carbon dioxide from a flue gas stream is provided, the system comprising an absorber vessel configured to receive a flue gas stream, the absorber vessel comprising a first absorption stage configured to receive the flue gas stream and contact it with a first ionic solution, a second absorption stage configured to receive flue gas which has passed the first absorption stage and contact it with a second ionic solution, a first sump vessel, and a second sump vessel. Furthermore, a method for removing CO2 from a flue gas stream containing CO2 is provided, the method comprising the steps of a) contacting a flow of a first ionic solution comprising NH3 with a flue gas stream to remove a first portion of CO2 from the flue gas stream, b) collecting the used ionic solution from step a) in a first sump vessel, c) recycling ionic solution from the first sump vessel to step a), d) contacting a flow of a second ionic solution comprising NH3 with the flue gas stream to remove a second portion of CO2 from the flue gas stream, e) collecting the used ionic solution from step d) in a second sump vessel, and f) recycling ionic solution from the second sump vessel to step d).