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Cs salts of 12-tungstophosphoric acid supported on dealuminated USY as catalysts for hydroisomerization of n-heptane

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Abstract

A series of Pt-bearing dealuminated USY supported Cs salts of 12-tungstophosphoric acid (PW) catalysts were prepared and their catalytic performances were measured in the hydroisomerization of n-heptane with an atmospheric fixed-bed flow reactor. USY was found to be a poor support for Cs salts of PW, leading to a lower catalytic activity in this reaction, but dealuminated USY supported Cs salts of PW catalysts showed very high catalytic conversion and selectivity. Among the various Cs salts of PW with different Cs/P ratios, Cs2.0PW was revealed to be the most effective active species. Over the dealuminated USY supported catalyst with the Pt loading of 0.4 wt.% and Cs2.0PW loading of 10 wt.%, the conversion of n-heptane was enhanced up to 76.2% with a high selectivity to isomerized products of 92.2%.

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Acknowledgments

The authors thank the Natural Science Foundation of China (Nos. 20306011 and 20476046), the Ph.D. Program Foundation of Chinese University (No. 20040291002) and the Ph.D. Innovation Program Foundation of Nanjing University of Technology (No. BSCX200506) for financial supports.

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Authors and Affiliations

  1. Key Laboratory of Materials-Oriented Chemical Engineering of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University of Technology, No. 5 New Model Road, Nanjing, 210009, China

    Yan-bo Gu, Rui-ping Wei, Xiao-qian Ren & Jun Wang

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  1. Yan-bo Gu
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  2. Rui-ping Wei
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  3. Xiao-qian Ren
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  4. Jun Wang
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Correspondence to Jun Wang.

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Gu, Yb., Wei, Rp., Ren, Xq. et al. Cs salts of 12-tungstophosphoric acid supported on dealuminated USY as catalysts for hydroisomerization of n-heptane. Catal Lett 113, 41–45 (2007). https://doi.org/10.1007/s10562-006-9002-8

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