Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture
We explore the use of industrial sources of silicon and surfactant for obtaining low-cost MCM-41 materials and evaluate their performances as CO<sub>2</sub> adsorbents. All of them presented a high specific surface area with different structural characteristics and textural properties. I...
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MDPI AG
2023-12-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/11/12/480 |
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| author | Guillermo D. Aquino M. Sergio Moreno Cristian M. Piqueras Germán P. Benedictto Andrea M. Pereyra |
| author_facet | Guillermo D. Aquino M. Sergio Moreno Cristian M. Piqueras Germán P. Benedictto Andrea M. Pereyra |
| author_sort | Guillermo D. Aquino |
| collection | DOAJ |
| description | We explore the use of industrial sources of silicon and surfactant for obtaining low-cost MCM-41 materials and evaluate their performances as CO<sub>2</sub> adsorbents. All of them presented a high specific surface area with different structural characteristics and textural properties. Interestingly, the MCM-41 manufactured with the most economical reagents presented a S<sub>BET</sub> of 1602 m<sup>2</sup>·g<sup>−1</sup>. The template was removed by using thermal treatments in an air atmosphere or a washing process. Preservation of silanol groups proved to be more effective under washing or mild thermal treatment conditions with the advantage of their lower cost and environmental benefit. Surface reactivity against CO<sub>2</sub> was enhanced by anchoring APTS to silanol groups through wet grafting. All amino-functionalized materials showed a performance as CO<sub>2</sub> adsorbents comparable to those reported in the literature, reaching values close to 30 cm<sup>3</sup>·g<sup>−1</sup> at 25 °C and 760 mmHg. Samples with a higher concentration of silanol groups showed better performance. Our studies indicate that adsorbed CO<sub>2</sub> is retained at least up to 50 °C, and the CO<sub>2</sub> is chemisorbed on the silica modified with amine groups. The chemisorbed gas at very low pressures points to the potential use of these materials for CO<sub>2</sub> storage. |
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| institution | Directory Open Access Journal |
| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-03-08T20:39:38Z |
| publishDate | 2023-12-01 |
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| series | Inorganics |
| spelling | doaj.art-37b10050fbcf41a0aa1b426c55fb523f2023-12-22T14:16:08ZengMDPI AGInorganics2304-67402023-12-01111248010.3390/inorganics11120480Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> CaptureGuillermo D. Aquino0M. Sergio Moreno1Cristian M. Piqueras2Germán P. Benedictto3Andrea M. Pereyra4Centro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), UNLP-CONICET, La Plata 1900, ArgentinaInstituto de Nanociencia y Nanotecnología (INN), CNEA-CONICET-CAB, San Carlos de Bariloche 8402, ArgentinaPlanta Piloto de Ingeniería Química (PLAPIQUI), UNS-CONICET, Bahía Blanca 8000, ArgentinaCentro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), UNLP-CONICET, La Plata 1900, ArgentinaCentro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), UNLP-CONICET, La Plata 1900, ArgentinaWe explore the use of industrial sources of silicon and surfactant for obtaining low-cost MCM-41 materials and evaluate their performances as CO<sub>2</sub> adsorbents. All of them presented a high specific surface area with different structural characteristics and textural properties. Interestingly, the MCM-41 manufactured with the most economical reagents presented a S<sub>BET</sub> of 1602 m<sup>2</sup>·g<sup>−1</sup>. The template was removed by using thermal treatments in an air atmosphere or a washing process. Preservation of silanol groups proved to be more effective under washing or mild thermal treatment conditions with the advantage of their lower cost and environmental benefit. Surface reactivity against CO<sub>2</sub> was enhanced by anchoring APTS to silanol groups through wet grafting. All amino-functionalized materials showed a performance as CO<sub>2</sub> adsorbents comparable to those reported in the literature, reaching values close to 30 cm<sup>3</sup>·g<sup>−1</sup> at 25 °C and 760 mmHg. Samples with a higher concentration of silanol groups showed better performance. Our studies indicate that adsorbed CO<sub>2</sub> is retained at least up to 50 °C, and the CO<sub>2</sub> is chemisorbed on the silica modified with amine groups. The chemisorbed gas at very low pressures points to the potential use of these materials for CO<sub>2</sub> storage.https://www.mdpi.com/2304-6740/11/12/480MCM-41industrial reactantssilanol group preservationCO<sub>2</sub> capture |
| spellingShingle | Guillermo D. Aquino M. Sergio Moreno Cristian M. Piqueras Germán P. Benedictto Andrea M. Pereyra Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture Inorganics MCM-41 industrial reactants silanol group preservation CO<sub>2</sub> capture |
| title | Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture |
| title_full | Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture |
| title_fullStr | Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture |
| title_full_unstemmed | Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture |
| title_short | Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO<sub>2</sub> Capture |
| title_sort | alternative synthesis of mcm 41 using inexpensive precursors for co sub 2 sub capture |
| topic | MCM-41 industrial reactants silanol group preservation CO<sub>2</sub> capture |
| url | https://www.mdpi.com/2304-6740/11/12/480 |
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