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CO2 Adsorption Performance of Ionic Liquid [P66614][2-Op] Loaded onto Molecular Sieve MCM-41 Compared to Pure Ionic Liquid in Biohythane/Pure CO2 Atmospheres
- Cheng, Jun, Li, Yannan, Hu, Leiqing, Zhou, Junhu, Cen, Kefa
- Energy & Fuels 2016 v.30 no.4 pp. 3251-3256
- adsorption, biogas, carbon dioxide, hydrogen, ionic liquids, surface area
- With the upgrading of fermentative biogas to produce gaseous transport fuel, ionic liquid (IL) [P₆₆₆₁₄][2-Op], which adsorbed CO₂ through multiple-site cooperative interactions, was loaded onto molecular sieve MCM-41 to adsorb CO₂ in a biohythane atmosphere (CH₄ + H₂ + CO₂). [P₆₆₆₁₄][2-Op] loaded onto MCM-41 exhibited a higher CO₂ adsorption rate than pure IL during the initial stage because of its larger reaction surface area. However, the CO₂ adsorption rate of [P₆₆₆₁₄][2-Op] loaded onto MCM-41 became lower than that of pure IL as the reaction continued because CO₂ was inaccessible to the IL blocked within the inner pores of MCM-41. The CO₂ adsorption rate of IL loaded onto the molecular sieve (MCM-41–50% IL) was (51.5 mg of CO₂ g–¹ of IL min–¹) 2.1 times higher than that of pure IL during the initial 1 min in a pure CO₂ atmosphere and was (24.6 mg of CO₂ g–¹ of IL min–¹) 2.2 times higher than that of pure IL during the initial 2 min in a biohythane atmosphere.