Thermochemical Study of CO2 Capture by Mesoporous Silica Gel Loaded with the Amino Acid Ionic Liquid 1-ethyl-3-methylimidazolium Glycinate Full article
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Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
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| Output data | Year: 2022, Volume: 341, Article number : 112113, Pages count : 9 DOI: 10.1016/j.micromeso.2022.112113 | ||||
| Tags | Carbon capture; carbon dioxide; Composite material; Ionic liquid; Silica gel | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0007 |
Abstract:
A series of composite CO2 sorbents were obtained by placing an amino acid ionic liquid (AAIL) 1-Ethyl-3-methylimidazolium glycine ([Emim][Gly]) into mesoporous silica gel using an impregnation method. The parameters of the porous structure for the silica support and composite sorbents were determined from nitrogen adsorption-desorption isotherms measured at 77 K. The morphology of the materials was studied using field-emission scanning electron microscopy. It was shown that at lower [Emim][Gly] loadings (<50 wt%), the sorption is fast and the dynamic CO2 sorption capacity of the material is proportional to the mass content of the AAIL. At higher [Emim][Gly] loadings (≥50 wt%), the rate of CO2 sorption by the AAIL decreases due to hindered mass transfer. An increase in CO2 concentration in the gas flow leads to a faster sorption and higher CO2 sorption capacity for the AAIL-containing composite. Meanwhile, the integral enthalpy of sorption decreases with increasing CO2 concentration, which can be explained by the greater contribution of physical adsorption/absorption processes to the total CO2 sorption capacity at higher CO2 concentrations. The most promising composite material (40 wt% [Emim][Gly]/SiO2) was tested in consecutive temperature-swing sorption-desorption cycles. It was demonstrated that lowering the regeneration temperature from 100 to 80 °C leads to a decrease in the dynamic sorption capacity of the material, but ensures its stability in the cyclic sorption-desorption process. © 2022 Elsevier Inc.
Cite:
Sheshkovas A.Z.
, Veselovskaya J.V.
, Rogov V.A.
, Kozlov D.V.
Thermochemical Study of CO2 Capture by Mesoporous Silica Gel Loaded with the Amino Acid Ionic Liquid 1-ethyl-3-methylimidazolium Glycinate
Microporous and Mesoporous Materials. 2022. V.341. 112113 :1-9. DOI: 10.1016/j.micromeso.2022.112113 WOS Scopus РИНЦ ANCAN OpenAlex
Thermochemical Study of CO2 Capture by Mesoporous Silica Gel Loaded with the Amino Acid Ionic Liquid 1-ethyl-3-methylimidazolium Glycinate
Microporous and Mesoporous Materials. 2022. V.341. 112113 :1-9. DOI: 10.1016/j.micromeso.2022.112113 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | May 6, 2022 |
| Accepted: | Jul 12, 2022 |
| Published print: | Aug 1, 2022 |
| Published online: | Aug 19, 2022 |
Identifiers:
| Web of science: | WOS:000852925900003 |
| Scopus: | 2-s2.0-85134731087 |
| Elibrary: | 50366051 |
| Chemical Abstracts: | 2022:1929480 |
| Chemical Abstracts (print): | 180:69576 |
| OpenAlex: | W4286257753 |