Mesoporous NiO-Al2O3 catalyst for high pressure partial oxidation of methane to syngas

Junpei Horiguchi, Yasukazu Kobayashi, Seishiro Kobayashi, Yuichiro Yamazaki, Kohji Omata, Daisuke Nagao, Mikio Konno, Muneyoshi Yamada

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Mesoporous NiO-Al2O3 catalysts were applied to catalytic partial oxidation of methane at 650 °C, 1 MPa with a feed composition of CH4/O2/N2/Ar = 5.2 vol.%/2.6 vol.%/4.9 vol.%/balance. In order to investigate the effect of mesopore of the catalyst on the catalytic activity, we used various types of organic reagents, such as P123, F127, PEG6000, and some carboxylic acids, to prepare bulk NiO-Al2O3 catalysts. Among the organic reagents P123, F127, and PEG6000 were effective for the formation of mesopores. As a result of activity tests, the catalyst prepared by using P123 showed the highest oxidative activity and selectivity; the values were higher than those of NiO catalyst supported on α-Al2O3 or γ-Al2O 3. Results of pulse reaction indicated that the oxidation tolerance of NiO-Al2O3 prepared with P123 was high under reaction conditions. The effect of pore size of the catalyst was predominant because in the mesopores the diffusion values of the reactant gases are different and the CH4/O2 ratio in the pores was kept high. These factors contributed to the high selectivity of the mesoporous NiO-Al2O 3 catalysts.

Original languageEnglish
Pages (from-to)86-92
Number of pages7
JournalApplied Catalysis A: General
Volume392
Issue number1-2
DOIs
Publication statusPublished - 2011 Jan 29

Keywords

  • Mesoporous
  • NiO-AlO catalyst
  • Oxidative reforming of methane
  • Partial oxidation of methane
  • Short contact time reaction
  • Syngas formation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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