Abstract: The green production of formic acid and utilization of methanol over heterogeneous catalysis system were investigated in this study. The heterogeneous catalysts are widely used in the chemical industry. They offer high stability and reusability which can enhance the production ability and lower the production cost, it can be considered as the sustainable energy solution for the future.
Part 1. Selective oxidation reaction of glycerol to formic acid.
This study revealed a highly efficient and reusable mesoporous silicate supported heteropoly acid material for glycerol oxidation reaction to formic acid. Detailed characterizations of the final products were carried out by N2 adsorption and desorption, XRD, HR-TEM, SEM, ICP-OES, XANES, NH3-TPD, and FTIR to identify the chemical properties and the porous structure of silica-supported PVxMo, as well as the strong interaction between PVxMo with the silica skeleton. These critical properties explain the bifunctionality of silica-supported PVxMo as a catalyst for the selective oxidation of glycerol to formic acid (Conv. of 60% and Sel. of 30 %) with standing stability.
Part2. Non-oxidative dehydrogenation of methanol to methyl formate An adjustable Cu-based catalyst showed that, although the active site is metallic copper (Cu0), the best reaction conditions were obtained by tuning the ratio of Cu/Mg and doping the catalyst with Pd to achieve a very specific activity for methyl formate synthesis.
Part 3. Selective oxidation reaction of methanol to dimethoxymethane
The redox and acidic properties of catalysts both play a critical role for methanol to dimethoxymethane reaction. The Ce-Al mixed oxide supported vanadium catalyst were characterized using various techniques, such as XRD, XRF, XPS, Raman spectroscopy, HR-TEM, BET, H2-TPR, and NH3-TPD. The supported V2O5 catalyst achieves the best catalytic performance (62.1 % conversion and 85.6 % DMM selectivity) with a Ce/Al specific ratio of 1.