期刊
WATER AIR AND SOIL POLLUTION
卷 227, 期 8, 页码 -出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11270-016-2925-9
关键词
Mesoporous; Task-specific ionic liquids; CO2 capture; Durability
资金
- Ministry of Science and Technology of Taiwan [NSC 101-2628-E-151-003-MY3]
Combination of active and thermally stable amino acid-functionalized ionic liquids (AAILs) with high surface area and porosity of mesocellular silica foams (MCF) to form a robust CO2 sorbent is investigated in this study. These sorbent composites (MCF-x) are synthesized by immobilizing three AAILs (Gly, Lys, and Arg) intoMCF by a simple wet-impregnation method. The prepared AAILs and MCF-x sorbents are characterized by N-2 adsorption/desorption, small-angle Xray scattering (SAXS), elemental analysis (EA), and Fourier-transformed infrared (FTIR) spectroscopies. Their corresponding CO2 sorption-desorption performance at 348 K under ambient pressure using dry 15 % CO2 is also studied. The obtained results show that the AAILs have low CO2 sorption capacities and rates because of their high viscosities. The MCF-x sorbents, however, exhibit remarkable enhancement of sorption capacities and fast kinetics. Among these sorbents, MCF-Lys possesses the superior sorption capacity of 1.38 mmol(CO2/gsorbent), the higher tolerance to water moisture and much better long-term durability which may be a promising sorbent for CO2 capture applications.
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