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Hydroisomerization of n-Heptane Over Cr Promoted Pt-bearing H3PW12O40 Catalysts Supported on Dealuminated USY Zeolite

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Abstract

The Pt-bearing H3PW12O40 (PW) catalysts, promoted by Cr or La, supported on dealuminated USY zeolite were prepared and their catalytic activities were evaluated in the hydroisomerization of n-heptane with an atmospheric fixed-bed reactor. The catalysts were characterized by XRD, BET, IR and H2-chemisorption. The results showed that the dealuminated USY support retained the Y zeolite structure and the PW well kept its Keggin structure in the supported PW catalysts and the doping of Cr or La into the catalysts enhanced the dispersion of Pt on the catalyst surface. The Pt-bearing PW catalysts doped with Cr or La, especially Cr, exhibited much higher catalytic activity and selectivity than the catalysts without dopants. Both the conversion and selectivity were discussed in relation with physicochemical properties of catalysts.

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Acknowledgments

The authors give their sincere thanks to the Natural Science Foundation of China (No. 20476046) and the Program for Hi-Tech Research of the Jiangsu Province (BG2006034), for financial supports.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211198, People’s Republic of China

    Ruiping Wei & Guomin Xiao

  2. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, 210009, People’s Republic of China

    Jun Wang

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  1. Ruiping Wei
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  2. Jun Wang
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  3. Guomin Xiao
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Correspondence to Ruiping Wei.

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Wei, R., Wang, J. & Xiao, G. Hydroisomerization of n-Heptane Over Cr Promoted Pt-bearing H3PW12O40 Catalysts Supported on Dealuminated USY Zeolite. Catal Lett 127, 360–367 (2009). https://doi.org/10.1007/s10562-008-9691-2

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  • DOI: https://doi.org/10.1007/s10562-008-9691-2

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