Thermodynamic and catalytic properties of Cu- and Pd- oxides over mixed γ–χ–Al2O3 for methanol dehydration toward dimethyl ether

摘要: Abstract The development of catalytic systems to generate alternative energies capable replacing diesel is a great challenge. Methanol dehydration (2CH3OH → CH3OCH3 + H2O) one the most suitable reactions produce dimethyl ether (DME). In DME synthesis, CuO/γ–Al2O3 based-materials showed be catalytically active at high pressures, but these lack performance under atmospheric conditions. this work, we synthesized CuO/γ–χ–Al2O3, PdO/γ–χ–Al2O3, and CuO PdO/γ–χ–Al2O3 by facile impregnation method for methanol pressure. Catalytic results that sample performed highest activity. All catalysts reached selectivity 100% toward DME, regardless reaction temperature. Remarkably, bimetallic catalyst containing low loadings copper palladium retained stability during 48 h 275 °C, after its regeneration they similar trend. activation (Ea) using activity compared with material lowest γ–χ–Al2O3 were obtained. energy values 112.57 kJ/mol 45.73 kJ/mol, respectively.