2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 5. Marquis Intl. Symp. / New and Advanced Materials and Technologies
| Editors: | Kongoli F, Marquis F, Chikhradze N |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 590 pages |
| ISBN: | 978-1-987820-69-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Mesoporous Silica Impregnated with Acetate-based Ionic Liquids for CO2 Capture
Amr Henni1; Hussameldin Ibrahim1; Mohanned Mohamedali1;1UNIVERSITY OF REGINA, Regina, Canada;
Type of Paper: Regular
Id Paper: 287
Topic: 43
Abstract:
Tuning the interior pores of solid sorbents by introducing chemical functionality is considered an effective approach to increase the adsorption uptake and the separation selectivity of porous solids. Herein, this work examines, the synthesis of novel composite sorbents utilizing ionic liquid 1‑Butyl-3-methylimidazolium Acetate (bmimAc) and 1‑Ethyl-3-methylimidazolium Acetate (emimAc) impregnated into the pores of mesoporous silica (MCM-41). In order to study the effect of the ionic liquid impregnation on the properties of the composite sorbent, different bmimAc@MCM-41 and emimAc@MCM-41 samples were prepared using different ionic liquid loadings. To quantify the actual loadings of bmimAc and emimAc in the composite, thermogravimetric analysis (TGA) was performed and the difference in the thermal decomposition profiles was used to estimate the impregnation efficiency. Fourier transform infrared spectroscopy (FTIR) was carried out to confirm the impregnation process by detecting characteristic peaks corresponding to both the ionic liquid and the solid support MCM-41. The porous structure of the as-prepared composites were studied using N2 adsorption isotherms and it was found that the porosity of the samples was remarkably reduced due to the occupation of the pore surface with ionic liquids. The solubility of CO2 in bmimAc@MCM-41 and emimAc@MCM-41 composites at different pressures and temperatures was evaluated using intelligent gravimetric analyzer (IGA003). The composite sorbents exhibited substantially higher CO2 uptakes, selectivity, and adsorption enthalpy than the bare MCM-41 which is attributed to the presence of the reactive acetate ions inside the MCM-41 pores. This work provide insight into the preparation, characterization, and sorption performance of ionic liquid modified solid sorbents, which have great potential for CO2 removal from flue gas.
Keywords:
Energy; Environment; New and advanced materials; Sustainable development;References:
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