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Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen

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Abstract

The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hβ, USY and Al2O3 for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H2SO4/HZSM-5 catalysts for the DHAM reaction was compared to study the effect of acidic treatment in the impregnation method. The results showed that the optimum activity of W-H2SO4/HZSM-5 catalyst exceeded that of W/HZSM-5 catalyst. Finally, the influence of Si/Al ratio in the W-H2SO4/HZSM-5 catalyst was studied and the catalyst with Si/Al ratio = 30 was found to be the most promising for the DHAM reaction. The remarkable activity of the catalyst is attributed to the presence of dual effects: suitable content of octahedral polymeric and tetrahedral monomeric tungstate species accompanied by proper amount and strength of acid sites in the catalyst.

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Authors and Affiliations

  1. Department of Chemical Engineering, Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia, 81310, UTM, Skudai, Johor, Malaysia

    Kusmiyati & N.A.S. Amin

  2. Department of Chemical Engineering, Muhammadiyah University of Surakarta, Pabelan Surakarta, 57102, Indonesia

    Kusmiyati

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  1. Kusmiyati
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  2. N.A.S. Amin
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Kusmiyati, Amin, N. Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen. Catal Lett 102, 69–78 (2005). https://doi.org/10.1007/s10562-005-5205-7

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  • DOI: https://doi.org/10.1007/s10562-005-5205-7

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