Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 344, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2021.117927
Keywords
Mixed ionic liquids (MILs); Efficient absorption; Molecular dynamics simulation; Quantum chemical calculation
Funding
- National Natural Science Foundation of China [U1862103]
Ask authors/readers for more resources
This study investigated the thermodynamic feasibility, absorption results, and molecular mechanism of capturing SO2 with mixed ionic liquids (MILs) for [EMIM][SCN] and [EMIM][Cl]. It was found that adding [EMIM][Cl] to [EMIM][SCN] could increase the SO2 absorption capacity, and van der Waals force played a leading role in the process of SO2 absorption. Molecular dynamics simulations further analyzed the interaction between molecules and the distribution state in terms of interaction energy, radial distribution functions (RDFs), and spatial distribution functions (SDFs).
In this work, the thermodynamic feasibility, absorption results and molecular mechanism of capturing SO2 with mixed ionic liquids (MILs) for 1-ethyl-3-methylimidazolium thiocyanate ([EMIM][SCN]) and 1-ethyl-3-methylimidazolium chlorine ([EMIM][Cl]) were investigated for the first time. The analysis of excess enthalpy of SO2 and IL systems shows the thermodynamic feasibility of SO2 capture process by the ionic liquids (ILs). The results of free volume (V-f) and fractional free volume (FFV) of the MILs system indicating that adding [EMIM][Cl] to [EMIM][SCN] could increase the SO2 absorption capacity. Then the weak interaction between molecules was analyzed microscopically, indicating that the van der Waals force played a leading role in the process of SO2 absorption. Moreover, molecular dynamics (MD) simulations were carried out for the process of MILs absorption of SO2, and the interaction between molecules and the distribution state were further analyzed in terms of interaction energy, radial distribution functions (RDFs) and spatial distribution functions (SDFs). Overall, the study on MILs desulfurization mechanism could provide new perspective for the design of green and efficient flue gas desulfurization solvents. (C) 2021 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available