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

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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)].
出处 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 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。
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