Mechanism of methane partial oxidation over SiO2-supported Nickel catalyst

Hai You Wang*, Chak Tong Au*, Huilin Wan

*Corresponding author for this work

Research output: Contribution to journalJournal article


The partial oxidation reaction of methane over reduced 10wt% Ni/Si02 catalyst was studied at 600, 650 and 700ºC by means of pulse and bond-order conservation Morse-potential (BOC-MP) methods. In the oxidation reaction of surface carbon deposited on the catalyst, it was observed that the product selectivity was subject to the reaction temperature and the selectivity of CO was increased with raising temperature when the molar ratio of surface carbon to oxygen was above one. In the reaction of CH4/02, the same trend between CO selectivity and reaction temperature was also observed, implying that the partial oxidation of methane to syngas follows the pyrolysis mechanism under the reaction conditions. The BOC-MP calculation on the elementary reaction steps over Ni(111) surface indicates that the direct dissociation of CH4 without the involvement of surface oxygen is more likely to occur and the formation of CO from CH(s) occurs more readily than from C(s).
Original languageEnglish
Pages (from-to)285-290
Number of pages6
JournalChemical Research in Chinese Universities
Issue number3
Publication statusPublished - Aug 1996

User-Defined Keywords

  • Methane oxidation
  • Syngas
  • Nickel
  • Pulse
  • Bond-order conservation
  • Morse-potential (BOC-MP) approach


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