Catalysis by heterogeneous supported heteropoly acid

摘要: Abstract Catalytic performance and availability of supported heteropoly acid under vapor-phase conditions were studied through alkylation benzene with ethylene, esterification acetic ethanol, dehydration 2-propanol as model reactions. These reactions differ from each other in terms the affinity reaction substrate for acid. Heteropolytungstic exhibited high catalytic activity selectivity when it was loaded on silica gel or activated carbon. In every reaction, there observed a ceiling at certain content (ca. 15–25 wt%). The results XRD TPD measurements suggest that which are operated more than 150 °C proceed principally surface, most surface layers, crystallites dispersed support. Supported appears to excel silica-alumina, phosphoric acid, acidic zeolites capability particularly those carried out relatively low temperatures (less 200 °C) involve water reactant product.