Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores
Industrial CO<sub>2</sub> emissions contribute to pollution and greenhouse effects, highlighting the importance of carbon capture. Potassium carbonate (K<sub>2</sub>CO<sub>3</sub>) is an effective CO<sub>2</sub> absorbent, yet its liquid-phase absorpti...
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2024-11-01
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| author | Yuan Zhao Jiangbo Huo Xuefei Wang Shunwei Ma |
| author_facet | Yuan Zhao Jiangbo Huo Xuefei Wang Shunwei Ma |
| author_sort | Yuan Zhao |
| collection | DOAJ |
| description | Industrial CO<sub>2</sub> emissions contribute to pollution and greenhouse effects, highlighting the importance of carbon capture. Potassium carbonate (K<sub>2</sub>CO<sub>3</sub>) is an effective CO<sub>2</sub> absorbent, yet its liquid-phase absorption faces issues like diffusion resistance and corrosion risks. In this work, the solid adsorbents were developed with K<sub>2</sub>CO<sub>3</sub> immobilized on the selected porous supports. Al<sub>2</sub>O<sub>3</sub> had an optimum CO<sub>2</sub> adsorption capacity of 0.82 mmol g<sup>−1</sup>. After further optimization of its pore structure, the self-prepared support Al<sub>2</sub>O<sub>3</sub>-2, which has an average pore diameter of 11.89 nm and a pore volume of 0.59 cm<sup>3</sup> g<sup>−1</sup>, achieved a maximum CO<sub>2</sub> adsorption capacity of 1.12 mmol g<sup>−1</sup> following K<sub>2</sub>CO<sub>3</sub> impregnation. Additionally, the relationship between support structure and CO<sub>2</sub> adsorption efficiency was also analyzed. The connectivity of the pores and the large pore diameter of the support may play a key role in enhancing CO<sub>2</sub> adsorption performance. During 10 cycles of testing, the K<sub>2</sub>CO<sub>3</sub>-based adsorbents demonstrated consistent high CO<sub>2</sub> adsorption capacity with negligible degradation. |
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| institution | Kabale University |
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| language | English |
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| spelling | doaj-art-94199a2e760a4f0bbe8eb8c80c1f6b0d2024-11-26T18:16:33ZengMDPI AGNanomaterials2079-49912024-11-011422183810.3390/nano14221838Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected PoresYuan Zhao0Jiangbo Huo1Xuefei Wang2Shunwei Ma3Tianjin College, University of Science and Technology Beijing, Tianjin 301830, ChinaTianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaTianjin College, University of Science and Technology Beijing, Tianjin 301830, ChinaTianjin College, University of Science and Technology Beijing, Tianjin 301830, ChinaIndustrial CO<sub>2</sub> emissions contribute to pollution and greenhouse effects, highlighting the importance of carbon capture. Potassium carbonate (K<sub>2</sub>CO<sub>3</sub>) is an effective CO<sub>2</sub> absorbent, yet its liquid-phase absorption faces issues like diffusion resistance and corrosion risks. In this work, the solid adsorbents were developed with K<sub>2</sub>CO<sub>3</sub> immobilized on the selected porous supports. Al<sub>2</sub>O<sub>3</sub> had an optimum CO<sub>2</sub> adsorption capacity of 0.82 mmol g<sup>−1</sup>. After further optimization of its pore structure, the self-prepared support Al<sub>2</sub>O<sub>3</sub>-2, which has an average pore diameter of 11.89 nm and a pore volume of 0.59 cm<sup>3</sup> g<sup>−1</sup>, achieved a maximum CO<sub>2</sub> adsorption capacity of 1.12 mmol g<sup>−1</sup> following K<sub>2</sub>CO<sub>3</sub> impregnation. Additionally, the relationship between support structure and CO<sub>2</sub> adsorption efficiency was also analyzed. The connectivity of the pores and the large pore diameter of the support may play a key role in enhancing CO<sub>2</sub> adsorption performance. During 10 cycles of testing, the K<sub>2</sub>CO<sub>3</sub>-based adsorbents demonstrated consistent high CO<sub>2</sub> adsorption capacity with negligible degradation.https://www.mdpi.com/2079-4991/14/22/1838CO<sub>2</sub>potassium carbonateadsorbentaluminum oxide |
| spellingShingle | Yuan Zhao Jiangbo Huo Xuefei Wang Shunwei Ma Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores Nanomaterials CO<sub>2</sub> potassium carbonate adsorbent aluminum oxide |
| title | Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores |
| title_full | Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores |
| title_fullStr | Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores |
| title_full_unstemmed | Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores |
| title_short | Potassium-Based Solid Sorbents for CO<sub>2</sub> Adsorption: Key Role of Interconnected Pores |
| title_sort | potassium based solid sorbents for co sub 2 sub adsorption key role of interconnected pores |
| topic | CO<sub>2</sub> potassium carbonate adsorbent aluminum oxide |
| url | https://www.mdpi.com/2079-4991/14/22/1838 |
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