Aquino, G.D.; Moreno, M.S.; Piqueras, C.M.; Benedictto, G.P.; Pereyra, A.M. Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO2 Capture. Inorganics2023, 11, 480.
Aquino, G.D.; Moreno, M.S.; Piqueras, C.M.; Benedictto, G.P.; Pereyra, A.M. Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO2 Capture. Inorganics 2023, 11, 480.
Aquino, G.D.; Moreno, M.S.; Piqueras, C.M.; Benedictto, G.P.; Pereyra, A.M. Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO2 Capture. Inorganics2023, 11, 480.
Aquino, G.D.; Moreno, M.S.; Piqueras, C.M.; Benedictto, G.P.; Pereyra, A.M. Alternative Synthesis of MCM-41 Using Inexpensive Precursors for CO2 Capture. Inorganics 2023, 11, 480.
Abstract
We explore the use of industrial sources of silicon and surfactant for obtaining low-cost MCM-41 materials and evaluate their performance as CO2 adsorbents. All of them presented a high specific surface area with different structural characteristics and textural properties. 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 CO2 was enhanced by anchoring APTS to silanol groups through wet grafting. All amino-functionalized materials showed a performance as CO2 adsorbents comparable to those reported in the literature. Samples with a higher concentration of silanol groups showed better performance. Our studies indicate that adsorbed CO2 is retained at least up to 50°C, and the presence of aminopropyl groups is a key issue in CO2 chemisorption on the MCM-41 surface. The chemisorbed gas at very low pressures points to the potential use of these materials for CO2 storage.
Keywords
MCM-41; industrial reactants; silanol group preservation; CO2 capture
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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