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Designing of anion‐functionalized ionic liquids for efficient capture of SO 2 from flue gas
Author(s) -
Chen Kaihong,
Lin Wenjun,
Yu Xini,
Luo Xiaoyan,
Ding Fang,
He Xi,
Li Haoran,
Wang Congmin
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14793
Subject(s) - chemistry , ionic liquid , flue gas , enthalpy , absorption (acoustics) , desorption , substituent , ion , absorption capacity , adsorption , inorganic chemistry , analytical chemistry (journal) , organic chemistry , chemical engineering , thermodynamics , catalysis , materials science , physics , engineering , composite material
Five kinds of anion‐functionalized ionic liquids (ILs) with different basicity and substituent were selected, prepared and applied in the capture of SO 2 from flue gas, where the concentration of SO 2 is only 2000 ppm. The effect of the anion on SO 2 absorption capacity, desorption residue, and available absorption capacity under 2000 ppm was investigated. The relationship between available absorption capacity and absorption enthalpy was also studied. Through a combination of thermodynamic analysis and quantum calculation, the results indicated that the effect of the cation in the IL on absorption enthalpy was significant. However, the effect of chain length in the cation was weak. Hence, a new IL with low molecular weight, [P 4442 ][Tetz], was further designed and applied for the capture of SO 2 , which shows the high absorption capacity of 0.18 g SO 2 per g IL and excellent reversibility for 2000 ppm SO 2 . © 2015 American Institute of Chemical Engineers AIChE J , 61: 2028–2034, 2015