Mesoporous Fluorocarbon‐Modified Silica Aerogel Membranes Enabling Long‐Term Continuous CO2 Capture with Large Absorption Flux Enhancements. Issue 3 (18th February 2013)

• Record Type: Journal Article
• Authors: Lin, Yi‐Feng; Chen, Chien‐Hua; Tung, Kuo‐Lun; Wei, Te‐Yu; Lu, Shih‐Yuan; Chang, Kai‐Shiun
• Is Part Of: ChemSusChem. Volume 6:Issue 3(2013:Mar.)
• Page Start: 437
• Page End: 442
• Publication Date: 2013-02-18
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201200837
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The use of a membrane contactor combined with a hydrophobic porous membrane and an amine absorbent has attracted considerable attention for the capture of CO₂ because of its extensive use, low operational costs, and low energy consumption. The hydrophobic porous membrane interface prevents the passage of the amine absorbent but allows the penetration of CO₂ molecules that are captured by the amine absorbent. Herein, highly porous SiO₂ aerogels modified with hydrophobic fluorocarbon functional groups (CF₃) were successfully coated onto a macroporous Al₂O₃ membrane; their performance in a membrane contactor for CO₂ absorption is discussed. The SiO₂ aerogel membrane modified with CF₃ functional groups exhibits the highest CO₂ absorption flux and can be continuously operated for CO₂ absorption for extended periods of time. This study suggests that a SiO₂ aerogel membrane modified with CF₃ functional groups could potentially be used in a membrane contactor for CO₂ absorption. Also, the resulting hydrophobic SiO₂ aerogel membrane contactor is a promising technology for large‐scale CO₂ absorption during the post‐combustion process in power plants.</p> </abstract>