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Benzene Alkylation with Propane over Mo Modified HZSM-5

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Abstract

Benzene alkylation with propane has been studied over HZSM-5 loading 3.1–15.4 wt% Mo in continuous-flow microreactor under 350 °C and atmospheric pressure with the highest activity obtained at 6.7 wt% Mo loading. C7–9 aromatics were obtained as main products while the total amount of benzene rings kept unchanged. i-Propylbenzene and n-propylbenzene are formed primarily, while toluene, ethylbenzene, and ethyl-toluene are formed secondly from the propylbenzenes. Catalytic performance of 6.7 wt% Mo/HZSM-5(38) partially poisoned by NH3 shows that the strong acid sites play a crucial role in the alkylation. Low SiO2/Al2O3 ratio of HZSM-5 in the Mo modified catalysts gives high propane conversion. Two hydrothermal treatment methods were applied to the 6.7 wt% Mo/HZSM-5(38) catalyst, caused decrease of propane conversion but result in different product distribution. A possible reaction mechanism concerning bifunctional active centers resulted from combination of loaded Mo species and strong acid centers on HZSM-5 is proposed.

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Authors and Affiliations

  1. Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, 116023, Liaoning, China

    Xueqing Huang, Xinde Sun, Shukui Zhu & Zhongmin Liu

  2. Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China

    Xueqing Huang

  3. Daqing Oilfield Company Limited, Daqing, 163000, Heilongjiang, China

    Xueqing Huang

Authors
  1. Xueqing Huang
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  2. Xinde Sun
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  3. Shukui Zhu
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  4. Zhongmin Liu
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Correspondence to Zhongmin Liu.

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Huang, X., Sun, X., Zhu, S. et al. Benzene Alkylation with Propane over Mo Modified HZSM-5. Catal Lett 119, 332–338 (2007). https://doi.org/10.1007/s10562-007-9240-4

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  • DOI: https://doi.org/10.1007/s10562-007-9240-4

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