Carbon dioxide uptake from natural gas by binary ionic liquid–water mixtures

Kris Anderson; Martin P. Atkins; Julien Estager; Yongcheun Kuah; Shieling Ng; Alexander A. Oliferenko; Natalia V. Plechkova; Alberto V. Puga; Kenneth R. Seddon; David F. Wassell

doi:10.1039/C5GC00720H

Carbon dioxide uptake from natural gas by binary ionic liquid–water mixtures†

Kris Anderson,^a Martin P. Atkins,^a Julien Estager,^a Yongcheun Kuah,^a Shieling Ng,^a Alexander A. Oliferenko,^a Natalia V. Plechkova,*^a Alberto V. Puga,‡^a Kenneth R. Seddon^a and David F. Wassell*^a

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^a The QUILL Research Centre, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Stranmillis Road, Belfast BT9 5AG, UK
E-mail: quill@qub.ac.uk

Abstract

Carbon dioxide solubility in a set of carboxylate ionic liquids formulated with stoicheiometric amounts of water is found to be significantly higher than for other ionic liquids previously reported. This is due to synergistic chemical and physical absorption. The formulated ionic liquid/water mixtures show greatly enhanced carbon dioxide solubility relative to both anhydrous ionic liquids and aqueous ionic liquid solutions, and are competitive with commercial chemical absorbers, such as activated N-methyldiethanolamine or monoethanolamine.

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Carbon dioxide uptake from natural gas by binary ionic liquid–water mixtures†

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