Efficient SO_(2)removal using aqueous ionic liquid at low partial pressure  

作　　者：Yutong Jiang Yifeng Chen Fuliu Yang Jixue Fan Jun Li Zhuhong Yang Xiaoyan Ji 

机构地区：[1]College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China [2]Institute of Chemical Industry of Forest Products,CAF,Key Laboratory of Biomass Energy and Material,Jiangsu Province,Nanjing 210042,China [3]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China [4]Energy Engineering,Division of Energy Science,Luleå University of Technology,Luleå97187,Sweden

出　　处：《Chinese Journal of Chemical Engineering》2023年第6期355-363,共9页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China(22108115,21776123);China Postdoctoral Science Foundation funded project(2021 M691554);Kempe foundation(SMK21-0020)in Sweden。

摘　　要：The development of novel absorbents is essential for SO_(2)removal.In this study,a novel ionic liquid(IL,[BHEP][HSO_(4)])was prepared,and water was selected as the co-solvent.The density and viscosity of aqueous[BHEP][HSO_(4)]were measured and the SO_(2)absorption performance was systematically investigated.Furthermore,the thermodynamic properties of SO_(2)in aqueous[BHEP][HSO_(4)]were calculated.Additionally,the mechanism of SO_(2)absorption in aqueous[BHEP][HSO_(4)]was confirmed using Fouriertransform infrared and nuclear magnetic resonance spectroscopy.It showed that[BHEP][HSO_(4)]absorbed0.302 g·g^(-1)(g SO_(2)/g IL)at an SO_(2)partial pressure of 2000μl·L^(-1)at 303.2 K,and the SO_(2)desorption enthalpy was-39.63 k J·mol^(-1).The mechanistic study confirmed the chemical absorption of SO_(2)in aqueous[BHEP][HSO_(4)].

关 键 词：Ionic liquids Sulfur dioxide Absorption capacity Desorption enthalpy 

分 类 号：O645.1[理学—物理化学] O647.3[理学—化学] X701[环境科学与工程—环境工程]