Issue 10, 2019

Lewis acidic water as a new carrier for facilitating CO2 transport

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

Supplementary files

Article information

Article type
Communication
Submitted
12 ноем. 2018
Accepted
13 фев. 2019
First published
15 фев. 2019

J. Mater. Chem. A, 2019,7, 5190-5194

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

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements