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Synthesis, characterization, and catalytic properties of a hydrothermally stable Beta/MCM-41 composite from well-crystallized zeolite Beta

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Abstract

A Beta/MCM-41 composite has been synthesized with a new method by using well-crystallized zeolite Beta as silica and aluminum source. The prepared composite was characterized by XRD, FTIR, N2 adsorption/desorption at 77 K, FE-SEM, DTG, 29Si MAS NMR spectral techniques. It was shown that the composite consisted of a highly ordered mesoporous MCM-41 phase and a zeolite Beta phase. Its hexagonal mesoporous structure was still retained after statically treated for 120 h in boiling water. In contrast, the structure of generally synthesized Al-MCM-41 nearly completely collapsed. This might be attributed to the assembly of the dissolved fragments such as the first and/or secondary structural units of zeolite Beta into the mesoporous structure around surfactant micelles. This is supported by the catalytic result that the prepared composite showed higher activity and selectivity for medium fraction in hydrocracking of Daqing vacuum residue than the parent zeolite Beta, the Al-MCM-41 as well as the mechanical mixture of these two materials.

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Acknowledgements

This work is financially supported by the National Science Foundation of China (No. 20173039 and 20476060) and National Basic Research Program of China (No. 2004 CB 217806).

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Authors and Affiliations

  1. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, P. R. China

    Yuping Li & Kechang Xie

  2. Institute of Special Chemical, Taiyuan University of Technology, No. 79 West Yingze Street, Taiyuan, 030024, P. R. China

    Wei Zhang, Xiaoli Wang, Ying Zhang & Tao Dou

  3. The CNPC Key Laboratory of Catalysis, University of Petroleum, Fuxue Road, Changping, Beijing, 102249, P. R. China

    Ying Zhang & Tao Dou

Authors
  1. Yuping Li
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  2. Wei Zhang
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  3. Xiaoli Wang
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  4. Ying Zhang
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  5. Tao Dou
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  6. Kechang Xie
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Correspondence to Tao Dou.

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Li, Y., Zhang, W., Wang, X. et al. Synthesis, characterization, and catalytic properties of a hydrothermally stable Beta/MCM-41 composite from well-crystallized zeolite Beta. J Porous Mater 15, 133–138 (2008). https://doi.org/10.1007/s10934-007-9113-7

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  • DOI: https://doi.org/10.1007/s10934-007-9113-7

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