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The influence of the topology and acidity of zeolites on the hydrogenation reaction of 1,2,4-trimethylbenzene

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Abstract

The hydrogenation of 1,2,4-trimethylbenzene (1,2,4-TMB) was carried out over the zeolite catalysts of HZSM-5,HCOK-5, HBeta and HMCM-49 and bifunctional catalysts 2 %Ni/zeolite, which were prepared by incipient wetness impregnation. High catalytic performance was obtained on COK-5 zeolite under testing conditions. The conversion of 1,2,4-TMB rose from 59.4 % over HCOK-5 to 70.2 % over 2 %Ni/HCOK-5, so did the selectivity to BTX 37.6 % over HCOK-5 to 55.8 % over 2 %Ni/HCOK-5. In order to correlate their catalytic performances with their physicochemical properties, the catalysts were characterized by the joint use of various physicochemical characterization methods, such as XRD, TPD and TPR. The results showed that the excellent properties of both catalysts may be mainly assigned to the presence of a number of weakly acidic and intercrossing channels of 12MR + 10MR of HCOK-5. Improvement of the catalytic properties of 2 %Ni/HCOK-5 was related to the reduction of the nickel species bounded with the active zeolite Al-framework.

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Acknowledgments

This work was supported by the Foundation of Education Committee of Heilongjiang (Grant No.12531141).

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Authors and Affiliations

  1. College of Chemistry and Environment Engineering, Harbin University of Science and Technology, Xuefu Road 52, Harbin, 150010, Heilongjiang, China

    Zongwen Guo & Haiming Li

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  1. Zongwen Guo
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  2. Haiming Li
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Correspondence to Zongwen Guo.

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Guo, Z., Li, H. The influence of the topology and acidity of zeolites on the hydrogenation reaction of 1,2,4-trimethylbenzene. Reac Kinet Mech Cat 110, 195–205 (2013). https://doi.org/10.1007/s11144-013-0574-1

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