Nickel-Calcium Phosphate/Hydroxyapatite Catalysts for Partial Oxidation of Methane to Syngas: Effect of Composition

Jin Hyuk Jun, Kyeong Sook Jeong, Tae Jin Lee, Sang Jun Kong, Tae Hoon Lim, SukWoo Nam, Seong Ahn Hong, Ki June Yoon

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Abstract

Nickel-calcium phosphate/hydroxyapatite catalysts have recently been reported to exhibit high activity and selectivity in partial oxidation of methane (POM). In this work the optimum composition was determined. The optimum mole ratio of Ca/PO4 was around 10/6 and that of Ni/PO4 was in a range from 1.0/6 to 3.0/6 with the optimum Ca/PO4, and the activity could be related with the amount of metallic nickel. In a temperature range from ca. 400 to 700 K, an apparent autothermal reaction was observed to occur in some cases. This is due to the fact that the actual catalyst temperature is higher than the measured temperature, which comes from the exothermic nature of the reaction. The mixing sequence of the precursors during the catalyst preparation does little affect the catalyst activity and characteristics. Deactivation of the catalyst occurred slowly, but the catalyst could easily be regenerated. Moreover, the nickel-calcium phosphate/ hydroxyapatite catalyst showed higher activity than the nickel-strontium phosphate catalyst.

Original languageEnglish
Pages (from-to)140-146
Number of pages7
JournalKorean Journal of Chemical Engineering
Volume21
Issue number1
Publication statusPublished - 2004 Jan 1
Externally publishedYes

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Keywords

  • Calcium Hydroxyapatite
  • Calcium Phosphate
  • Nickel
  • Optimum Composition
  • Partial Oxidation of Methane

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Jun, J. H., Jeong, K. S., Lee, T. J., Kong, S. J., Lim, T. H., Nam, S., Hong, S. A., & Yoon, K. J. (2004). Nickel-Calcium Phosphate/Hydroxyapatite Catalysts for Partial Oxidation of Methane to Syngas: Effect of Composition. Korean Journal of Chemical Engineering, 21(1), 140-146.