Facilitated Transport in Hydroxide‐Exchange Membranes for Post‐Combustion CO2 Separation. Issue 1 (20th September 2013)

• Record Type: Journal Article
• Authors: Xiong, Laj; Gu, Shuang; Jensen, Kurt O.; Yan, Yushan S.
• Is Part Of: ChemSusChem. Volume 7:Issue 1(2014:Jan.)
• Page Start: 114
• Page End: 116
• Publication Date: 2013-09-20
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201300286
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Hydroxide‐exchange membranes are developed for facilitated transport CO₂ in post‐combustion flue‐gas feed. First, a correlation between the basicity of fixed‐site functional groups and CO₂‐separation performance is discovered. This relationship is used to identify phosphonium as a promising candidate to achieve high CO₂‐separation performance. Consequently, quaternary phosphonium‐based hydroxide‐exchange membranes are demonstrated to have a separation performance that is above the Robeson upper bound. Specifically, a CO₂ permeability as high as 1090 Barrer and a CO₂/N₂ selectivity as high as 275 is achieved. The high performance observed in the membranes can be attributed to the quaternary phosphonium moiety.</p> </abstract>