SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 41 ›› Issue (1): 441-448.DOI: 10.1016/j.cjche.2021.11.003

• Chemical Engineering Thermodynamics • 上一篇    下一篇

Solubility of CO2 in nonaqueous system of 2-(butylamino)ethanol with 2-butoxyethanol: Experimental data and model representation

Yu Dong, Tiantian Ping, Shufeng Shen   

  1. School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
  • 收稿日期:2021-06-29 修回日期:2021-11-03 出版日期:2022-01-28 发布日期:2022-02-25
  • 通讯作者: Shufeng Shen,E-mail address:sfshen@hebust.edu.cn
  • 基金资助:
    This work was supported by Natural Science Foundation of Hebei Province (B2018208154), Department of Education of Hebei Province, P.R. China (SLRC2019051) and Key Foundation of Hebei Provincial Department of Science and Technology, P.R. China (21373703D).

Solubility of CO2 in nonaqueous system of 2-(butylamino)ethanol with 2-butoxyethanol: Experimental data and model representation

Yu Dong, Tiantian Ping, Shufeng Shen   

  1. School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
  • Received:2021-06-29 Revised:2021-11-03 Online:2022-01-28 Published:2022-02-25
  • Contact: Shufeng Shen,E-mail address:sfshen@hebust.edu.cn
  • Supported by:
    This work was supported by Natural Science Foundation of Hebei Province (B2018208154), Department of Education of Hebei Province, P.R. China (SLRC2019051) and Key Foundation of Hebei Provincial Department of Science and Technology, P.R. China (21373703D).

摘要: Nonaqueous amine-based system is an attractive solution to overcome high-energy-intensive CO2 capture process using the conventional aqueous amines. Advanced nonaqueous absorbent of 2- (butylamino)ethanol (BAE) with 2-butoxyethanol (2-BE) has been recently proposed for low-energyconsumption CO2 capture. In this work, Henry’s law constants of CO2 in the BAE/2-BE blend were obtained by N2O/CO2 analogy, and correlated in the temperature range of (283–333) K. Vapor-liquid equilibrium (VLE) data for the BAE + CO2 + 2-BE system at 65.4% (mass) BAE were also determined in a stirred equilibrium cell at temperatures of (313–393) K and CO2 partial pressures up to 275 kPa. A single apparent equilibrium constant KCO2,app was proposed for this system and correlated as a function of temperature, carbonated degree of amine and CO2 loading. Solubility data were well represented by the modified Kent-Eisenberg model with an average absolute relative deviation (AARD) of 13%.

关键词: Solubility, CO2 capture, Nonaqueous absorbent, 2-(Butylamino)ethanol, 2-Butoxyethanol, Model

Abstract: Nonaqueous amine-based system is an attractive solution to overcome high-energy-intensive CO2 capture process using the conventional aqueous amines. Advanced nonaqueous absorbent of 2- (butylamino)ethanol (BAE) with 2-butoxyethanol (2-BE) has been recently proposed for low-energyconsumption CO2 capture. In this work, Henry’s law constants of CO2 in the BAE/2-BE blend were obtained by N2O/CO2 analogy, and correlated in the temperature range of (283–333) K. Vapor-liquid equilibrium (VLE) data for the BAE + CO2 + 2-BE system at 65.4% (mass) BAE were also determined in a stirred equilibrium cell at temperatures of (313–393) K and CO2 partial pressures up to 275 kPa. A single apparent equilibrium constant KCO2,app was proposed for this system and correlated as a function of temperature, carbonated degree of amine and CO2 loading. Solubility data were well represented by the modified Kent-Eisenberg model with an average absolute relative deviation (AARD) of 13%.

Key words: Solubility, CO2 capture, Nonaqueous absorbent, 2-(Butylamino)ethanol, 2-Butoxyethanol, Model