Influence of the Anions on the Interaction Energy between Water and Ionic Liquids

Zheng, Chaolun; Shen, Ziyang; Zhou, Jian; Pei, Yong; Yang, Bao

doi:10.1002/ceat.202100438

Title: Influence of the Anions on the Interaction Energy between Water and Ionic Liquids

Journal Article · 04 January 2022 · Chemical Engineering and Technology

DOI: https://doi.org/10.1002/ceat.202100438 · OSTI ID:1976295

Zheng, Chaolun ^[1]; Shen, Ziyang ^[2]; Zhou, Jian ^[2]; Pei, Yong ^[2]; Yang, Bao ^[2]

Univ. of Maryland, College Park, MD (United States); Univ. of Maryland, College Park, MD (United States)
Univ. of Maryland, College Park, MD (United States)

It is essential to understand the interaction energy between water and ionic liquids (ILs) in search of ILs for dehumidification applications. In this paper, the intermolecular interaction energy between water and 1-ethyl-3-methylimidazolium ([EMIM])-based ILs was investigated. The vapor-liquid equilibrium data were first measured for solutions of [EMIM][BF₄], [EMIM][N(CN)₂], [EMIM][CF₃SO₃], and [EMIM][CH₃SO₃] with water molar fractions of 8–95 % at temperatures of 303–343 K. The IL-IL and water-IL intermolecular interaction energies were determined by using the correlated non-random two-liquid model. The results revealed that fluorine atoms in anions reduce the attraction energy between IL and water, and thus, decrease the water affinity.

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Research Organization:: Univ. of Maryland, College Park, MD (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0008672

OSTI ID:: 1976295

Alternate ID(s):: OSTI ID: 1841441

Journal Information:: Chemical Engineering and Technology, Journal Name: Chemical Engineering and Technology Journal Issue: 2 Vol. 45; ISSN 0930-7516

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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