Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas
An efficient CO<sub>2</sub> adsorbent with a hierarchically micro-mesoporous structure and a large number of amine groups was fabricated by a two-step synthesis technique. Its structural properties, surface groups, thermal stability and CO<sub>2</sub> adsorption performance w...
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MDPI AG
2022-05-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/11/3429 |
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| author | Yilan Chen Junjie Wu Xin Wang Minyi Liu Yamin Liu |
| author_facet | Yilan Chen Junjie Wu Xin Wang Minyi Liu Yamin Liu |
| author_sort | Yilan Chen |
| collection | DOAJ |
| description | An efficient CO<sub>2</sub> adsorbent with a hierarchically micro-mesoporous structure and a large number of amine groups was fabricated by a two-step synthesis technique. Its structural properties, surface groups, thermal stability and CO<sub>2</sub> adsorption performance were fully investigated. The analysis results show that the prepared CO<sub>2</sub> adsorbent has a specific hierarchically micro-mesoporous structure and highly uniformly dispersed amine groups that are favorable for the adsorption of CO<sub>2</sub>. At the same time, the CO<sub>2</sub> adsorption capacity of the prepared adsorbent can reach a maximum of 3.32 mmol-CO<sub>2</sub>/g-adsorbent in the actual flue gas temperature range of 303–343 K. In addition, the kinetic analysis results indicate that both the adsorption process and the desorption process have rapid adsorption/desorption rates. Finally, the fitting of the CO<sub>2</sub> adsorption/desorption experimental data by Avrami’s fractional kinetic model shows that the CO<sub>2</sub> adsorption rate is mainly controlled by the intra-particle diffusion rate, and the temperature has little effect on the adsorption rate. |
| first_indexed | 2024-03-10T01:04:08Z |
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| id | doaj.art-08a023bf90c04faf816d33cf7067e59d |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T01:04:08Z |
| publishDate | 2022-05-01 |
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| series | Molecules |
| spelling | doaj.art-08a023bf90c04faf816d33cf7067e59d2023-11-23T14:28:35ZengMDPI AGMolecules1420-30492022-05-012711342910.3390/molecules27113429Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue GasYilan Chen0Junjie Wu1Xin Wang2Minyi Liu3Yamin Liu4School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, ChinaSchool of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, ChinaSchool of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, ChinaSchool of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, ChinaSchool of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, ChinaAn efficient CO<sub>2</sub> adsorbent with a hierarchically micro-mesoporous structure and a large number of amine groups was fabricated by a two-step synthesis technique. Its structural properties, surface groups, thermal stability and CO<sub>2</sub> adsorption performance were fully investigated. The analysis results show that the prepared CO<sub>2</sub> adsorbent has a specific hierarchically micro-mesoporous structure and highly uniformly dispersed amine groups that are favorable for the adsorption of CO<sub>2</sub>. At the same time, the CO<sub>2</sub> adsorption capacity of the prepared adsorbent can reach a maximum of 3.32 mmol-CO<sub>2</sub>/g-adsorbent in the actual flue gas temperature range of 303–343 K. In addition, the kinetic analysis results indicate that both the adsorption process and the desorption process have rapid adsorption/desorption rates. Finally, the fitting of the CO<sub>2</sub> adsorption/desorption experimental data by Avrami’s fractional kinetic model shows that the CO<sub>2</sub> adsorption rate is mainly controlled by the intra-particle diffusion rate, and the temperature has little effect on the adsorption rate.https://www.mdpi.com/1420-3049/27/11/3429CO<sub>2</sub> adsorbenthierarchically micro-mesoporous siliconamine-functionalizedkinetic |
| spellingShingle | Yilan Chen Junjie Wu Xin Wang Minyi Liu Yamin Liu Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas Molecules CO<sub>2</sub> adsorbent hierarchically micro-mesoporous silicon amine-functionalized kinetic |
| title | Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas |
| title_full | Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas |
| title_fullStr | Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas |
| title_full_unstemmed | Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas |
| title_short | Synthesis, Characterization and Application of Amine-Functionalized Hierarchically Micro-Mesoporous Silicon Composites for CO<sub>2</sub> Capture in Flue Gas |
| title_sort | synthesis characterization and application of amine functionalized hierarchically micro mesoporous silicon composites for co sub 2 sub capture in flue gas |
| topic | CO<sub>2</sub> adsorbent hierarchically micro-mesoporous silicon amine-functionalized kinetic |
| url | https://www.mdpi.com/1420-3049/27/11/3429 |
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