Jump to main content
Jump to site search

Issue 10, 2019
Previous Article Next Article

Lewis acidic water as a new carrier for facilitating CO2 transport

Author affiliations

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.

Graphical abstract: Lewis acidic water as a new carrier for facilitating CO2 transport

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Nov 2018, accepted on 13 Feb 2019 and first published on 15 Feb 2019


Article type: Communication
DOI: 10.1039/C8TA10871D
J. Mater. Chem. A, 2019,7, 5190-5194

  •   Request permissions

    Lewis acidic water as a new carrier for facilitating CO2 transport

    S. C. Park, I. S. Chae, G. H. Moon, B. S. Kim, J. Jang, M. Wessling and Y. S. Kang, J. Mater. Chem. A, 2019, 7, 5190
    DOI: 10.1039/C8TA10871D

Search articles by author

Spotlight

Advertisements