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Hydrocracking of heavy oil using zeolites Y/Al-SBA-15 composites as catalyst supports

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Abstract

A series of Y/Al-SBA-15 composites were prepared by a two-step synthesis procedure in mild acidic medium. The materials were characterized by powder X-ray diffraction (XRD), N2 sorption isotherms and TEM techniques. Catalytic cracking of cumene and 1,3,5-tri-isopropylbenzene was carried out as the probing reactions on these composites. The XRD results showed that these materials are composites of Al-SBA-15 and Y zeolite. N2 sorption isotherms and TEM displayed that these composites were abundant in micropores and mesopores. At the same time, the mesopores may communicate with the␣micropores in some domains, which may result in the high catalytic activities of Y/Al-SBA-15 composites for the␣cracking of both small-molecule (cumene) and large-molecule (1,3,5-tri-isopropylbenzene) hydrocarbons. The existence of mesopores may also make the acid sites easily accessible for reactants. Catalysts of W–Ni supported on Y/Al-SBA-15 and modified Y zeolites with mesopores were prepared by impregnation method, and the hydrocracking of heavy oil was performed on these catalysts. The catalyst using zeolite Y/mesoporous Al-SBA-15 composites as support gave higher yield of diesel compared to the catalysts using modified zeolite Y as support. In addition, the higher aromatics potential of heavy naphtha and the significantly lower BMCI (U.S. Bureau of Correlation Index) of tail oil revealed Y/Al-SBA-15 composite catalyst possessed integrated performance in the hydrocracking of heavy oil. These results proved that the combination of Y zeolites and mesoporous Al-SBA-15 plays a great role in improving the performance of catalysts for hydrocracking heavy oils.

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Acknowledgments

This work has been supported by CNPC projects (2000808–01), (030801-03-03) and (040803-03-00).

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Authors and Affiliations

  1. College of Chemistry & Chemical Engineering, China University of Petroleum, No. 271, Bei’er Road, Dongying, 257061, P.R. China

    Xuejun Zhang & Zongxian Wang

  2. Institute of Daqing Petrochemical Company, Daqing, 163714, P.R. China

    Xuejun Zhang, Zhihua Zhang & Famin Sun

  3. Department of Chemistry, Fudan University, Shanghai, 200433, P.R. China

    Fuqiang Zhang, Xuewu Yan & Dongyuan Zhao

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  1. Xuejun Zhang
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  2. Fuqiang Zhang
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  4. Zhihua Zhang
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  6. Zongxian Wang
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Correspondence to Xuejun Zhang.

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Zhang, X., Zhang, F., Yan, X. et al. Hydrocracking of heavy oil using zeolites Y/Al-SBA-15 composites as catalyst supports. J Porous Mater 15, 145–150 (2008). https://doi.org/10.1007/s10934-007-9114-6

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