Issue 4, 2019, Issue in Progress

Absorption and thermodynamic properties of CO2 by amido-containing anion-functionalized ionic liquids

Abstract

In this contribution, two kinds of amido-containing anion-functionalized ionic liquids (ILs) were designed and synthesized, where the anions of these ILs were selected from deprotonated succinimide (H-Suc) and o-phthalimide (Ph-Suc). Then, these functionalized ILs were used to capture CO2. Towards to this end, solubility of CO2 in the ILs was determined at different temperatures and different CO2 partial pressures. Based on these data, chemical equilibrium constants of CO2 with the ILs were derived at different temperatures from the “deactivated IL” model. The other thermodynamic properties such as reaction Gibbs energy, reaction enthalpy, and reaction entropy in the absorption were also calculated from the corresponding equilibrium constant data at different temperatures. It was shown that these anion-functionalized ILs exhibited high CO2 solubility (up to 0.95 mol CO2 mol−1 IL) and low energy desorption, and enthalpy change was the main driving force for CO2 capture by using such ILs as absorbents. In addition, the interactions of CO2 with the ILs were also investigated by 1H NMR, 13C NMR, and FT-IR spectroscopy.

Graphical abstract: Absorption and thermodynamic properties of CO2 by amido-containing anion-functionalized ionic liquids

Supplementary files

Article information

Article type
Paper
Submitted
20 Sep 2018
Accepted
07 Jan 2019
First published
14 Jan 2019
This article is Open Access
Creative Commons BY license

RSC Adv., 2019,9, 1882-1888

Absorption and thermodynamic properties of CO2 by amido-containing anion-functionalized ionic liquids

Y. Huang, G. Cui, H. Wang, Z. Li and J. Wang, RSC Adv., 2019, 9, 1882 DOI: 10.1039/C8RA07832G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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