Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (3): 373-378.DOI: 10.1016/j.cjche.2015.08.007

• CHEMICAL ENGINEERING THERMODYNAMICS • Previous Articles     Next Articles

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

WeiWang1,3, Zhi Yun1,3, Zhigang Tang2, Xia Gui1   

  1. 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
  • Received:2015-05-22 Revised:2015-06-30 Online:2016-04-08 Published:2016-03-28
  • Supported by:

    Supported by the National Natural Science Foundation of China(21306088), the State Key Laboratory of Chemical Engineering(SKL-ChE-13A01, Tsinghua University, China), and the Priority Academic Program Development of Jiangsu Higher Education Institutions(China).

Abstract: The binary vapor-liquid equilibrium data of CO2 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-volumemethod.Itwas found by contrast that the ether group in solvents can promote the CO2 absorption, but the hydroxyl group will inhibit the CO2 absorption.Furthermore, the solubilities of CO2 showed an upward trendwith the increasing molecular lengths of absorbents.The experimental data were also correlatedwith a modified Patel-Teja equation of state(PT EOS) combined with the traditional van derWaals one-fluid mixing rules and the results showed a satisfactory agreement between the model and the experimental data.

Key words: Vapor-liquid equilibrium, CO2, Diethylene glycol ethers, PT EOS