Síntese e Caracterização de SBA-15: Suporte para catalisadores óxidos de Cu, Zn, Zr para hidrogenação de CO2

Abstract

The use of oil and its derivatives increases carbon emissions and the concentration of atmospheric CO2, the main greenhouse gas (GHG), which has reached more than 400 ppm in recent years, directly impacting climate change and rising temperatures. from the planet. CO2 is an inert and highly selective molecule, which configures the need for catalytic species with such selectivity and efficiency for its conversion. Therefore, the objective of this work is the development of mesostructured supports with specific properties, suitable for the incorporation of metals and subsequent application to the catalytic hydrogenation of CO2 to methanol. Supports of the SBA-15 type were synthesized with hexagonal type morphology (fibers), and platelet and medium pore type morphologies with the addition of decane and dodecane, respectively. The observed diffractometers showed characteristic peaks that characterize the formation of the material of the SBA-15 type, in addition, the formation of the proposed morphologies was observed by micrographs, except for the platelet type, due to the disruption of the formed particles. The addition of alkanes caused displacement of the main peaks, increasing the mesoporous parameters and the interplanar distance of the materials, as well as modifying the average size of the formed particles. In addition, it caused a significant reduction in specific surface areas and total pore volume, while micropore volume, pore diameter and wall thickness increased.