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Synthesis of Mixed Alumina Silica Its Catalytic Performance Pillared Zirconium Phosphate and in Epoxidation of Soyate
The mixed alumina--silica pillared zirconium phosphate material was synthesized by template directing self-assembly method. The textural properties of the material was systematically characterized by X—ray diffraction(XRD),Brunauer-Emmett-Teller(BET), Field emission scanning electron microscope (FESEM)and 27 A1 Nuclear magnetic resonance(A1 NMR). The formation mechanism of the mixed aluminasilica pillared zirconium phosphate was further studied.
The results show that the aluminum source is presented as etrahedral aluminum grafted onto the gallery and the octahedral aluminum on the layer, repectively. In the evaluation of catalytic performance, the epoxidation reaction of soyate is used to study the mixed alumina—silica pillared material. It exhibits 91.7% epoxy selectivity. The analysis of the catalytic behavior indicate that the ordered interlayer structure given by the template-directing self-assembly method provokes an adequately contact between the relatively large reactants of methyl soyate and the active sites. With the FTIR spectra of adsorbed pyridine and the analysis of the reaction kinetics.it can be found that the excellent catalytic performance compared with the pure silica pillared zirconium phosphate material and other solid acids is due to the abundant Lewis sites arising from the introducing of the alumina source.
The results show that the aluminum source is presented as etrahedral aluminum grafted onto the gallery and the octahedral aluminum on the layer, repectively. In the evaluation of catalytic performance, the epoxidation reaction of soyate is used to study the mixed alumina—silica pillared material. It exhibits 91.7% epoxy selectivity. The analysis of the catalytic behavior indicate that the ordered interlayer structure given by the template-directing self-assembly method provokes an adequately contact between the relatively large reactants of methyl soyate and the active sites. With the FTIR spectra of adsorbed pyridine and the analysis of the reaction kinetics.it can be found that the excellent catalytic performance compared with the pure silica pillared zirconium phosphate material and other solid acids is due to the abundant Lewis sites arising from the introducing of the alumina source.
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