Enhancement of Pd-Pt/Al2O3 catalyst performance in naphthalene hydrogenation by mixing different molecular sieves in the support |
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| Authors: | Mingxian Du,Zhanjun Lü |
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| Affiliation: | State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P.O. Box 165, Taiyuan, Shanxi 030001, PR China |
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| Abstract: | The hydrogenation of naphthalene in hexane was carried out over the catalyst Pd-Pt supported on alumina mixed with different molecular sieves including ZSM-5, Beta, USY and SAPO-11. The catalyst was characterized by N2 sorption, NH3-TPD, TPR, and H2-O2 titration. The results indicated that the catalyst performance for naphthalene hydrogenation is related to its acid property, pore structure, Pd-Pt dispersion, and metal-support interaction, which may be well regulated by mixing proper molecular sieves in the alumina support. The catalyst Pd-Pt supported on a two-component support of Al2O3-SAPO-11 is provided with proper acidity, large pores and moderate metal dispersion; it exhibits excellent performance in the saturated hydrogenation of naphthalene to decalin (over it a complete conversion of naphthalene is observed and the selectivity to decalin exceeds 90% at 260-300 °C). |
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| Keywords: | Naphthalene Hydrogenation Pd-Pt catalyst Mixed support Molecular sieves |
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