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

doi:10.1016/j.cjche.2018.02.022

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

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

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/Abstract

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

Yangyang Bian, Shufeng Shen. CO₂ absorption into a phase change absorbent: Water-lean potassium prolinate/ethanol solution[J]. Chinese Journal of Chemical Engineering, 2018, 26(11): 2318-2326.

Yangyang Bian, Shufeng Shen. CO₂ absorption into a phase change absorbent: Water-lean potassium prolinate/ethanol solution[J]. Chin.J.Chem.Eng., 2018, 26(11): 2318-2326.

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

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

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