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Direct partial oxidation of methane over ZSM-5 catalyst: Zn-ZSM-5 catalyst studies

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Abstract

Extended studies on Zn-ZSM-5 catalyst for the production of liquid hydrocarbons in the direct partial oxidation (DPO) of CH4 with O2 are reported. Previously, it was reported that metal-containing ZSM-5 catalysts could produce C5+ hydrocarbons from pure CH4/O2 feeds without feed additives. Zn-ZSM-5 produced the highest C5+ yields of the catalysts tested. This work shows that the method of introducing Zn onto the catalyst, ion-exchange versus impregnation, does not significantly alter C5+ yields if low Zn content is maintained (∼ 0.4–0.5 wt%). Liquid hydrocarbon yields in this system doubled after 8 h on stream while overall C2+ yields increased by over 300%. Mechanistic implications of these findings are discussed. Finally, processing a natural gas feed over Zn-ZSM-5 gave higher C5+ yields over CH4 feed but these yields were not improved over previously published results using HZSM-5.

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Author notes

  1. R. E. Palermo

    Present address: Department of Physical Chemistry, Hoffman-LaRoche, 340 Kingsland St., 07110, Nutley, NJ, USA

Authors and Affiliations

  1. Central Research Laboratory, Mobil Research and Development Corporation, PO Box 1025, 08543-1025, Princeton, NJ, USA

    S. Han, E. A. Kaufman, D. J. Martenak, R. E. Palermo, J. A. Pearson & D. E. Walsh

Authors
  1. S. Han
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  2. E. A. Kaufman
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  3. D. J. Martenak
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  4. R. E. Palermo
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  5. J. A. Pearson
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  6. D. E. Walsh
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Han, S., Kaufman, E.A., Martenak, D.J. et al. Direct partial oxidation of methane over ZSM-5 catalyst: Zn-ZSM-5 catalyst studies. Catal Lett 29, 27–32 (1994). https://doi.org/10.1007/BF00814248

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  • DOI: https://doi.org/10.1007/BF00814248

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