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Improving Physical Adsorption of CO 2 by Ionic Liquids‐Loaded Mesoporous Silica
Author(s) -
Mirzaei Mojtaba,
Mokhtarani Babak,
Badiei Alireza,
Sharifi Ali
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700314
Subject(s) - ionic liquid , sorption , adsorption , mesoporous silica , desorption , selectivity , mesoporous material , chemical engineering , chemistry , vaporization , materials science , inorganic chemistry , organic chemistry , catalysis , engineering
CO 2 sorption capacities of the neat and silica‐supported 1‐butyl‐3‐methylimidazolium‐based ionic liquids (ILs) were measured under atmospheric pressure. The silica‐supported ILs were synthesized by the impregnation‐vaporization method and charactrized by N 2 adsorption/desorption and thermogravimeteric analysis (TGA). Evaluation of the effects of influential factors on sorption capacity demonstrated that by increase of the temperature, flow rate, and the weight percentage of ILs in sorbents, the sorption capacity decreases. Among the sorbents, [Bmim][TfO] and SiO 2 ‐[Bmim][BF 4 ](50) had the highest capacity. By increasing the IL portion in SiO 2 ‐[Bmim][BF 4 ], the selectivity for CO 2 to CH 4 could be improved. The CO 2 ‐rich sorbents could be easily recycled.