Catalytic Activity of Modified Mesoporous Materials with Ti and V in the oxidation of α-pinene

Abstract

The catalytic performance of mesoporous materials with a MCM-41 structure in the reaction of α-pinene oxidation with H_2O_2 were investigated by a comparative study of Ti-MCM-41 and V-MCM-41 catalysts. These materials were prepared by hydrothermal synthesis, from theoretical molar ratios silicon / metal (Si/M) = 20, 60 and 240 in the initial synthesis gel. The results of the catalytic evaluation showed that for a similar content of molar change in the materials, Ti-MCM-41 presented a major TON values, displaying high selectivity to verbenone. Furthermore, V-MCM-41 showed a lower efficiency of H_2O_2 than Ti-MCM-41, which can be attributed to the presence of clusters species (V-O-V) n and nano-oxides V_xO_y which accelerate the decomposition reaction of peroxide to water