SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (11): 2318-2326.DOI: 10.1016/j.cjche.2018.02.022

• Special issue of Carbon Capture, Utilisation and Storage • 上一篇    下一篇

CO2 absorption into a phase change absorbent: Water-lean potassium prolinate/ethanol solution

Yangyang Bian, Shufeng Shen   

  1. School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
  • 收稿日期:2017-12-13 修回日期:2018-02-22 出版日期:2018-11-28 发布日期:2018-12-10
  • 通讯作者: Shufeng Shen
  • 基金资助:

    Supported by Hebei Provincial Natural Science Foundation for Distinguished Young Scholars of China (Grant No. B2015208067), Training Program for Talent Engineering of Hebei Province (Grant No. A2017002022) and Key Program of Hebei Provincial Natural Science Foundation (Grant No. B2018208154).

CO2 absorption into a phase change absorbent: Water-lean potassium prolinate/ethanol solution

Yangyang Bian, Shufeng Shen   

  1. School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
  • Received:2017-12-13 Revised:2018-02-22 Online:2018-11-28 Published:2018-12-10
  • Contact: Shufeng Shen
  • Supported by:

    Supported by Hebei Provincial Natural Science Foundation for Distinguished Young Scholars of China (Grant No. B2015208067), Training Program for Talent Engineering of Hebei Province (Grant No. A2017002022) and Key Program of Hebei Provincial Natural Science Foundation (Grant No. B2018208154).

摘要: Phase change solvents are attractive energy-efficient absorbents for carbon dioxide (CO2) capture due to CO2-rich phase formation. Potassium prolinate + water + ethanol (ProK/W/Eth) solution has shown good capture characteristics as a promising one in our previous work. In this work, absorption rate of CO2, solubility of N2O, and heat of absorption for ProK/W/Eth solution were investigated using a stirred cell reactor and a CPA201 reaction calorimeter and these results were also compared with the aqueous ProK and 30 mass% MEA solutions. Using ethanol as a solvent can substantially increase the CO2 physical solubility and the absorption rate of CO2 in ProK/W/Eth solutions is far higher than that in aqueous 30 mass% MEA solutions especially at a low CO2 loading range. Solid precipitation, obtained from the liquid-to-solid phase change absorption, was analyzed by 13C NMR and DSC-TGA. The enthalpy change for ProK/W/Eth solutions at various CO2 loading was also discussed.

关键词: CO2 absorption, Phase change absorbent, Potassium prolinate, Ethanol, Heat of absorption

Abstract: Phase change solvents are attractive energy-efficient absorbents for carbon dioxide (CO2) capture due to CO2-rich phase formation. Potassium prolinate + water + ethanol (ProK/W/Eth) solution has shown good capture characteristics as a promising one in our previous work. In this work, absorption rate of CO2, solubility of N2O, and heat of absorption for ProK/W/Eth solution were investigated using a stirred cell reactor and a CPA201 reaction calorimeter and these results were also compared with the aqueous ProK and 30 mass% MEA solutions. Using ethanol as a solvent can substantially increase the CO2 physical solubility and the absorption rate of CO2 in ProK/W/Eth solutions is far higher than that in aqueous 30 mass% MEA solutions especially at a low CO2 loading range. Solid precipitation, obtained from the liquid-to-solid phase change absorption, was analyzed by 13C NMR and DSC-TGA. The enthalpy change for ProK/W/Eth solutions at various CO2 loading was also discussed.

Key words: CO2 absorption, Phase change absorbent, Potassium prolinate, Ethanol, Heat of absorption