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Enhanced Sulfur Tolerance of Bimetallic PtPd/Al2O3 Catalysts for Hydrogenation of Tetralin by Addition of Fluorine

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Abstract

A series of mono- and bi-metallic Pt-Pd/Al2O3 samples with and without F were studied as aromatic hydrogenation catalysts. The effects of changing the order of impregnation of the Pt precursor and F as well as varying the calcination temperature (300–500 °C) were investigated. Temperature programmed reduction (TPR) results demonstrate the presence of a higher fraction of dispersed metal precursor species left on the surface from the impregnation (PtO x Cl y ) on the Pt/Al2O3 sample calcined at high temperature. The impregnation of F before the Pt precursor significantly decreases the interaction between the metal and the support. However, this decrease is not observed when F is impregnated after the metal precursor. For the bimetallic Pt-Pd catalysts, the sample prepared adding F before the metal show a higher degree of Pt-Pd interaction than either the parent Pt-Pd/Al2O3 catalyst or the one prepared with F added later. TPD of ammonia result show the increase in strong acid sites when F is present. Activity tests for tetralin hydrogenation in the presence of 350 ppm dibenzothiophene indicate a better sulfur tolerance for all F-promoted catalysts, especially Pt-Pd.

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Acknowledgments

This work was supported by the Thailand Research Fund. Partial support from the Ratchadapiseksomphot Endowment of Chulalongkorn University for the Petrochemical and Environmental Catalysis Research Unit is also acknowledged. We also acknowledge Mr. Surapas Sitthisa for performing the TPD of ammonia of the catalysts.

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Authors and Affiliations

  1. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok, Thailand

    Siriporn Jongpatiwut, Nitchanun Rattanapuchapong, Thirasak Rirksomboon & Somchai Osuwan

  2. School of Chemical, Biological, and Materials Science, The University of Oklahoma, Norman, OK, 73019, USA

    Daniel E. Resasco

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  1. Siriporn Jongpatiwut
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  2. Nitchanun Rattanapuchapong
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  3. Thirasak Rirksomboon
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  4. Somchai Osuwan
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  5. Daniel E. Resasco
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Correspondence to Siriporn Jongpatiwut.

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Jongpatiwut, S., Rattanapuchapong, N., Rirksomboon, T. et al. Enhanced Sulfur Tolerance of Bimetallic PtPd/Al2O3 Catalysts for Hydrogenation of Tetralin by Addition of Fluorine. Catal Lett 122, 214–222 (2008). https://doi.org/10.1007/s10562-007-9391-3

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  • DOI: https://doi.org/10.1007/s10562-007-9391-3

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