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oai:riuma.uma.es:10630/313352026-02-03T11:27:40Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Es Sih, Salima author Vilarrasa García, Enrique author De Azevedo, Diana Cristina Silva author Ballesteros-Plata, Daniel author Barroso-Martín, Isabel author Infantes-Molina, Antonia author Rodríguez-Castellón, Enrique author Franco-Duro, Francisco Ignacio author Cecilia-Buenestado, Juan Antonio author 2024 Five phyllosilicates (kaolinite, montmorillonite, saponite, sepiolite and palygorskite) have been selected as starting materi- als for the synthesis of zeolites. Among them, kaolinite and montmorillonite display the lowest Si/Al molar ratio leading to aluminosilicates with high crystallinity. Thus, the hydrothermal treatment under basic conditions forms 4A zeolite when kaolinite is used as starting material while 13X zeolite is obtained when montmorillonite is used as starting material. The microporosity and CO 2 -adsorption capacity of the prepared zeolites are directly related to its crystallinity. Thus, in order to improve it, raw phyllosilicates were subjected to a microwave-assisted treatment to remove undesired Mg or Fe-species, which have a negative effect in the assembling of the zeolites by hydrothermal basic conditions in a second step. The high- est adsorption value was 3.85 mmol/g at 25 °C and 760 mm of Hg for Mont-A-B sample after the consecutive treatments. Essih, S., Vilarrasa-García, E., Azevedo, D.C.S. et al. Zeolites synthesis from phyllosilicates and their performance for CO2 adsorption. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33685-0 https://hdl.handle.net/10630/31335 https://doi.org/10.1007/s11356-024-33685-0 Zeolitas Filosilicatos Dióxido de carbono - Absorción y adsorción Zeolites synthesis from phyllosilicates and their performance for CO2 adsorption