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Methanesulfonic acid(MSA) was successfully immobilized in silica, leading to a novel and environmentally friendly solid acid catalyst SMSA. The most important feature of SMSA is that anhydrous formic acid is used to hydrolysis of tetraethylorthosilicate(TEOS). No water was added in the whole preparation. Therefore, MSA could be anchored in silica matrix more effectively instead of being dissolved in water. This new organic/inorganic hybrid catalyst was characterized by powder X-ray diffraction(XRD), energy dispersive spectrum(EDS), N_2 adsorption-desorption analyzer, thermogravimetric analysis(TGA-DSC) and pyridine-FTIR. The catalytic activity was tested by alkylation of olefins and aromatics. High concentration acid sites, both Lewis and Br?nsted, abundant porosity and large surface area enabled the highest activity for SMSA, among MCM-22, ZSM-5 and industrial acidity clay.
The most important feature of SMSA is that anhydrous formic acid is used to hydrolysis of tetraethylorthosilicate (TEOS). No water was added in the This new organic / inorganic hybrid catalyst was characterized by powder X-ray diffraction (XRD), energy dispersive spectrum (EDS), N 2 adsorption- desorption analyzer, thermogravimetric analysis (TGA-DSC) and pyridine-FTIR. The catalytic activity was tested by alkylation of olefins and aromatics. High concentration acid sites, both of Lewis and Br? nsted, abundant porosity and large surface area enabled the highest activity for SMSA, among MCM-22, ZSM-5 and industrial acidity clay.