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Promoting Mechanism of Potassium in the Reforming of Ethanol on Pt/Al2O3 Catalyst

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Abstract

The reaction of ethanol and water has been investigated over K doped 1% Pt/Al2O3 catalysts. The presence of K resulted at room temperature in upward shift of the IR band of CO formed in the ethanol adsorption. At higher temperature the presence of surface acetate species was also detected which, according to the TPD results decomposed above 600 K to form CH4 and CO2. The K destabilized these forms. In the catalytic reaction the H2 selectivities were similar and much higher over all promoted Pt/Al2O3 than on the pure catalyst. In this study it was proved that the K had a destabilizing effect onto the surface acetate groups and thus improved the steam reforming activity of 1% Pt/Al2O3.

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Acknowledgments

Financial support of this work by Hungarian Science and Research Foundation (OTKA contract number T 046251) is gratefully acknowledged.

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Authors and Affiliations

  1. Institute of Solid State and Radiochemistry at the University of Szeged, Aradi vértanúk tere 1, P.O. Box 168, 6701, Szeged, Hungary

    M. Dömök, K. Baán, T. Kecskés & A. Erdőhelyi

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  1. M. Dömök
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  2. K. Baán
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  3. T. Kecskés
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  4. A. Erdőhelyi
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Correspondence to A. Erdőhelyi.

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Dömök, M., Baán, K., Kecskés, T. et al. Promoting Mechanism of Potassium in the Reforming of Ethanol on Pt/Al2O3 Catalyst. Catal Lett 126, 49–57 (2008). https://doi.org/10.1007/s10562-008-9616-0

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