Síntesis y Caracterización de sílice mesoporosa funcionalizada para la adsorción de CO2

DELICIA ACOSTA; MELISA ROMINA SERRANO; ELIO GONZO; PABLO M. CUESTA ZAPATA; MÓNICA PARENTIS

Córdoba

Congreso; XX Congreso Argentino de Catálisis; 2017

CITeQ, CONICET, UTN, SACat

3-aminopropyl triethoxysilane modified mesoporous silicas were synthesized by anchoring the organic groups on the support surface (MCM-41), using different molar ratios of SiO2:Aminosilane. The synthesized solids were characterized by N2 adsorption, XRD, FTIR and TG-DTA. The MCM-41 has a specific surface area of about 1500 m2/g, while that of the functionalized materials falls to around 600 m2/g, showing a tendency to decrease as the content of the functionalizing agent grows. The adsorption isotherms of pure and functionalized materials are characteristic of mesoporous type IV materials. The structural properties were studied by FTIR and XRD. TG-DTA studies allow analyzing the thermal stability of the materials and determining the deposited amine content. The surface modification of mesoporous silica with aminosilane increases the adsorption capacity of CO2 compared to that of the pure support.