Solubilities of CO2 in some glycol ethers under high pressure by experimental determination and correlation  

作　　者：Wei Wang Zhi Yun Zhigang Tang Xia Gui 

机构地区：[1]College of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China [2]State Key Laboratory of Chemical Engineering,Department of Chemical Engineering Tsinghua University,Beijing 100084,China

出　　处：《Chinese Journal of Chemical Engineering》2016年第3期373-378,共6页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China(21306088);the State Key Laboratory of Chemical Engineering(SKL-Ch E-13A01,Tsinghua University,China);the Priority Academic Program Development of Jiangsu Higher Education Institutions(China)

摘　　要：The binary vapor–liquid equilibrium data of CO_2 in diethylene glycol(monomethyl,monoethyl,monobutyl,dimethyl,diethyl,dibutyl)ether were determined from 288.15 to 318.15 K at pressure up to 6 MPa based on the constant-volume method.It was found by contrast that the ether group in solvents can promote the CO_2 absorption,but the hydroxyl group will inhibit the CO_2 absorption.Furthermore,the solubilities of CO_2 showed an upward trend with the increasing molecular lengths of absorbents.The experimental data were also correlated with a modified Patel–Teja equation of state(PT EOS)combined with the traditional van der Waals one-fluid mixing rules and the results showed a satisfactory agreement between the model and the experimental data.The binary vapor-liquid equilibrium data of CO2 in diethylene glycol （monomethyl, monoethyl, monobutyl, di- methyl, diethyl, dibutyl） ether were determined from 288.15 to 318.15 K at pressure up to 6 MPa based on the constant-volume method. It was found by contrast that the ether group in solvents can promote the CO2 absorp- tion, but the hydroxyl group will inhibit the CO2 absorption. Furthermore, the solubilities of CO2 showed an up- ward trend with the increasing molecular lengths of absorbents. The experimental data were also correlated with a modified Patel-Teja equation of state （PT EOS） combined with the traditional van der Waals one-fluid mixing rules and the results showed a satisfactory agreement between the model and the experimental data.

关 键 词：Vapor-liquid equilibrium CO2D iethylene glycol ethers PT EOS 

分 类 号：TQ223.24[化学工程—有机化工] TQ013.1