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Energy Analysis of Physical Absorption and Chemical Absorption of CO 2 in Ionic Liquids
Author(s) -
Xie Yujiao,
Liu Gang,
Nie Haiwei,
Yu Fangyong,
Xing Xiaoxue,
Cui Hongyou
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900529
Subject(s) - ionic liquid , absorption (acoustics) , solubility , chemistry , chemical engineering , materials science , organic chemistry , catalysis , engineering , composite material
CO 2 solubility in ionic liquids (ILs) is measured extensively to develop IL‐based technology for CO 2 capture. Herein, the choline‐ and acetate‐based ILs are selected as the studied physical and chemical absorbents for CO 2 capture, respectively. The CO 2 solubilities in choline‐ and acetate‐based ILs are thermodynamically modeled. The ILs consumed for CO 2 absorption and the energy demands for the ILs regeneration are calculated and compared with those of the conventional imidazolium‐based ILs. The results show that the three choline‐based ILs are not energy saving in the pressure‐swing process. In the temperature‐swing process, the energy demand for CO 2 absorption by using acetate‐based ILs reveals that the chemical absorption‐based ILs are the absorbent with lower energy demands compared with the physical absorption‐based ILs.