Improving Physical Adsorption of CO2 by Ionic Liquids‐Loaded Mesoporous Silica |
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| Authors: | Mojtaba Mirzaei Babak Mokhtarani Alireza Badiei Ali Sharifi |
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| Affiliation: | 1. University of Tehran, School of Chemistry, College of Science, Tehran, Iran;2. Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran |
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| Abstract: | CO2 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 N2 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 SiO2‐Bmim]BF4](50) had the highest capacity. By increasing the IL portion in SiO2‐Bmim]BF4], the selectivity for CO2 to CH4 could be improved. The CO2‐rich sorbents could be easily recycled. |
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| Keywords: | CO2 sorption Ionic liquid Silica‐supported ionic liquids Sorption capacity |
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