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Lewis acidic water as a new carrier for facilitating CO2 transport

Title
Lewis acidic water as a new carrier for facilitating CO2 transport
Author
장재영
Keywords
CARBON-DIOXIDE CAPTURE; FIXED-SITE-CARRIER; SEPARATION PROPERTIES; MEMBRANES; DIFFUSION; ANHYDRASE; IONS; SALT
Issue Date
2019-03
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 7, Issue 10, Page. 5190-5194
Abstract
We report the formation of a reversible complex between CO2 and a bound water coordinating alkaline metal cation (Lewis-acidic water) by nuclear magnetic resonance (NMR) analysis for the first time. Such a unique property of water can facilitate CO2 permeation by offering an additional carrier-mediated pathway, which is distinct from the commonly recognized bicarbonate or carbonate ion-mediated CO2 transport. These findings were exploited to develop an advanced polymeric membrane for separating CO2 directly from wet flue gases. A simply prepared poly(ethylene oxide)-based membrane containing potassium salts exhibits selective super-permeable characteristics for CO2 in humid environments; an exceptionally high CO2 permeance of 4650 gas-permeation units (GPU) with an ideal separation factor of 1500 was achieved for CO2/N2, which lies far above the upper bound of the selectivity–permeability trade-off curve, without any significant performance degradation over 6 months.
URI
https://pubs.rsc.org/en/content/articlelanding/2019/TA/C8TA10871D#!divAbstracthttp://repository.hanyang.ac.kr/handle/20.500.11754/107209
ISSN
2050-7488; 2050-7496
DOI
10.1039/c8ta10871d
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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