Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System
MCM-41, a mesoporous silica with a high surface area and hexagonal structure, was synthesized, and commercial nano-silicon dioxide (SiO<sub>2</sub>) was used as a solid adsorbed in post-combustion CO<sub>2</sub> capture. The CO<sub>2</sub> adsorption experiments w...
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MDPI AG
2023-09-01
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| author | Hind F. Hasan Farah T. Al-Sudani Talib M. Albayati Issam K. Salih Hamed N. Harharah Hasan Sh. Majdi Noori M. Cata Saady Sohrab Zendehboudi Abdelfattah Amari |
| author_facet | Hind F. Hasan Farah T. Al-Sudani Talib M. Albayati Issam K. Salih Hamed N. Harharah Hasan Sh. Majdi Noori M. Cata Saady Sohrab Zendehboudi Abdelfattah Amari |
| author_sort | Hind F. Hasan |
| collection | DOAJ |
| description | MCM-41, a mesoporous silica with a high surface area and hexagonal structure, was synthesized, and commercial nano-silicon dioxide (SiO<sub>2</sub>) was used as a solid adsorbed in post-combustion CO<sub>2</sub> capture. The CO<sub>2</sub> adsorption experiments were conducted in a fixed-bed adsorption system using 5–15 vol.% CO<sub>2</sub>/N<sub>2</sub> at a flow rate of 100 mL/min at varying temperatures (20–80 °C) and atmospheric pressure. Analyses (X-ray diffraction, nitrogen adsorption-desorption isotherms, Fourier-transform infrared spectroscopy, and transmission electron microscopy (TEM)) revealed that the synthesized MCM-41 has mesoporous characteristics: a high surface area and large pore volumes. The CO<sub>2</sub> adsorption capacity of MCM-41 and commercial nano-SiO<sub>2</sub> increased considerably with increasing CO<sub>2</sub> concentration and temperature, peaking at 60 °C. Below 60 °C, dynamics rather than thermodynamics governed the adsorption. Increasing the temperature from 60 to 80 °C decreased the adsorption capacity, and the reaction became thermodynamically dominant. Additionally, compared with commercial nano-SiO<sub>2</sub>, the MCM-41 sorbent demonstrated superior regenerability and thermal stability. |
| first_indexed | 2024-03-10T22:56:25Z |
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| last_indexed | 2024-03-10T22:56:25Z |
| publishDate | 2023-09-01 |
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| spelling | doaj.art-8ea6020b445b4cc598754450d45d790a2023-11-19T09:58:04ZengMDPI AGCatalysts2073-43442023-09-01139126710.3390/catal13091267Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed SystemHind F. Hasan0Farah T. Al-Sudani1Talib M. Albayati2Issam K. Salih3Hamed N. Harharah4Hasan Sh. Majdi5Noori M. Cata Saady6Sohrab Zendehboudi7Abdelfattah Amari8Department of Chemical Engineering, University of Technology-Iraq, 52 Alsinaa St., Baghdad 35010, IraqDepartment of Chemical Engineering, University of Technology-Iraq, 52 Alsinaa St., Baghdad 35010, IraqDepartment of Chemical Engineering, University of Technology-Iraq, 52 Alsinaa St., Baghdad 35010, IraqDepartment of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University, Babylon 51001, IraqDepartment of Chemical Engineering, College of Engineering, King Khalid University, Abha 61411, Saudi ArabiaDepartment of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University, Babylon 51001, IraqDepartment of Civil Engineering, Memorial University, St. John’s, NL A1B 3X5, CanadaDepartment of Process Engineering, Memorial University, St. John’s, NL A1B 3X5, CanadaResearch Laboratory of Processes, Energetics, Environment and Electrical Systems, National School of Engineers, Gabes University, Gabes 6072, TunisiaMCM-41, a mesoporous silica with a high surface area and hexagonal structure, was synthesized, and commercial nano-silicon dioxide (SiO<sub>2</sub>) was used as a solid adsorbed in post-combustion CO<sub>2</sub> capture. The CO<sub>2</sub> adsorption experiments were conducted in a fixed-bed adsorption system using 5–15 vol.% CO<sub>2</sub>/N<sub>2</sub> at a flow rate of 100 mL/min at varying temperatures (20–80 °C) and atmospheric pressure. Analyses (X-ray diffraction, nitrogen adsorption-desorption isotherms, Fourier-transform infrared spectroscopy, and transmission electron microscopy (TEM)) revealed that the synthesized MCM-41 has mesoporous characteristics: a high surface area and large pore volumes. The CO<sub>2</sub> adsorption capacity of MCM-41 and commercial nano-SiO<sub>2</sub> increased considerably with increasing CO<sub>2</sub> concentration and temperature, peaking at 60 °C. Below 60 °C, dynamics rather than thermodynamics governed the adsorption. Increasing the temperature from 60 to 80 °C decreased the adsorption capacity, and the reaction became thermodynamically dominant. Additionally, compared with commercial nano-SiO<sub>2</sub>, the MCM-41 sorbent demonstrated superior regenerability and thermal stability.https://www.mdpi.com/2073-4344/13/9/1267CO<sub>2</sub> adsorptionMCM-41regenerationCO<sub>2</sub> emissionscontinuous adsorptionfixed-bed adsorption |
| spellingShingle | Hind F. Hasan Farah T. Al-Sudani Talib M. Albayati Issam K. Salih Hamed N. Harharah Hasan Sh. Majdi Noori M. Cata Saady Sohrab Zendehboudi Abdelfattah Amari Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System Catalysts CO<sub>2</sub> adsorption MCM-41 regeneration CO<sub>2</sub> emissions continuous adsorption fixed-bed adsorption |
| title | Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System |
| title_full | Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System |
| title_fullStr | Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System |
| title_full_unstemmed | Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System |
| title_short | Synthesizing and Characterizing a Mesoporous Silica Adsorbent for Post-Combustion CO<sub>2</sub> Capture in a Fixed-Bed System |
| title_sort | synthesizing and characterizing a mesoporous silica adsorbent for post combustion co sub 2 sub capture in a fixed bed system |
| topic | CO<sub>2</sub> adsorption MCM-41 regeneration CO<sub>2</sub> emissions continuous adsorption fixed-bed adsorption |
| url | https://www.mdpi.com/2073-4344/13/9/1267 |
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