Absorption characteristics,model,and molecular mechanism of hydrogen sulfide in morpholine acetate aqueous solution  

作　　者：Hongwei Jin Yun Teng Kangkang Li Zhou Feng Zhonghao Li Shiqi Qu Hongzhi Xia Huanong Cheng Yugang Li Xinshun Tan Shiqing Zheng 

机构地区：[1]College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第2期125-135,共11页中国化学工程学报（英文版）

基　　金：Financial support from the National Natural Science Foundation of China(21775081);Shandong Province Natural Science Foundation(ZR2020MB145)。

摘　　要：The solubility of H_(2)S was measured in solutions of N-butyl-N-methylmorpholine acetate([Bmmorp][Ac])containing 20%-40%(mass)water at experimental temperatures ranged from 298.15 to 328.15 K and pressures up to 320 k Pa.The total solubility of H_(2)S increased with higher temperatures,lower pressures,and reduced water content.The reaction equilibrium thermodynamic model was used to correlate the solubility data.The results indicate that the chemical reaction equilibrium constant decrease with increasing water content and temperature,whereas Henry constant increase with increasing water content and temperature.Compared with other ionic liquids,H_(2)S exhibits a higher physical absorption enthalpy and a lower chemical absorption enthalpy in[Bmmorp][Ac]aqueous solution.This suggests that[Bmmorp][Ac]has a strong physical affinity for H_(2)S and low energy requirement for desorption.Quantum chemical methods were used to investigate the molecular mechanism of H_(2)S absorption in ionic liquids.The interaction energy analysis revealed that the binding of H_(2)S with the ionic liquid in a1:2 ratio is more stable.Detailed analyses by the methods of the interaction region indicator and the atoms in molecules were conducted to the interactions between H_(2)S and the ionic liquid.

关 键 词：Ionic liquid Hydrogen sulfide MODEL SOLUBILITY Molecular mechanism 

分 类 号：X701[环境科学与工程—环境工程] TQ028.17[化学工程]