title: Highly efficient and reversible SO2 capture by tunable azole-based ionic liquids through multiple-site chemical absorption.
abstract: A novel strategy for SO(2) capture through multiple-site absorption in the anion of several azole-based ionic liquids is reported. An extremely high capacity of SO(2) (>3.5 mol/mol) and excellent reversibility (28 recycles) were achieved by tuning the interaction between the basic anion and acidic SO(2). Spectroscopic investigations and quantum-mechanical calculations showed that such high SO(2) capacity originates from the multiple sites of interaction between the anion and SO(2). These tunable azole-based ionic liquids with multiple sites offer significant improvements over commonly used absorbents, indicating the promise for industrial applications in acid gas separation.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China. chewcm@zju.edu.cn
authors.forename: Congmin
authors.initials: C
authors.lastname: Wang
authors.forename: Guokai
authors.initials: G
authors.lastname: Cui
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Luo
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Xu
authors.forename: Haoran
authors.initials: H
authors.lastname: Li
authors.forename: Sheng
authors.initials: S
authors.lastname: Dai