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- W2915883043 abstract "The development of catalytic systems to generate alternative energies capable of replacing diesel is a great challenge. Methanol dehydration (2CH3OH → CH3OCH3 + H2O) is one of the most suitable catalytic reactions to produce dimethyl ether (DME). In DME synthesis, CuO/γ–Al2O3 based-materials showed to be catalytically active at high pressures, but these lack high performance under atmospheric conditions. In this work, we synthesized CuO/γ–χ–Al2O3, PdO/γ–χ–Al2O3, and CuOPdO/γ–χ–Al2O3 by a facile impregnation method for methanol dehydration at atmospheric pressure. Catalytic results showed that the CuOPdO/γ–χ–Al2O3 sample performed the highest activity. All catalysts reached selectivity of 100% toward DME, regardless of the reaction temperature. Remarkably, the bimetallic catalyst containing low loadings of copper and palladium retained stability during 48 h of reaction at 275 °C, and after its regeneration they showed a similar trend. The activation energies (Ea) for the methanol dehydration using the catalyst that performed the highest catalytic activity CuOPdO/γ–χ–Al2O3 compared with the material with the lowest catalytic activity γ–χ–Al2O3 were obtained. The activation energy values of the γ–χ–Al2O3 and CuOPdO/γ–χ–Al2O3 catalysts were 112.57 kJ/mol and 45.73 kJ/mol, respectively." @default.
- W2915883043 created "2019-03-02" @default.
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- W2915883043 date "2019-03-01" @default.
- W2915883043 modified "2023-10-01" @default.
- W2915883043 title "Thermodynamic and catalytic properties of Cu- and Pd- oxides over mixed γ–χ–Al2O3 for methanol dehydration toward dimethyl ether" @default.
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- W2915883043 doi "https://doi.org/10.1016/j.ijhydene.2019.01.243" @default.
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