Kinetics of catalytic oxidation of methane, ethane and propane over palladium oxide

Yuxuan Xin, Hai Wang, Chung K. Law

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Catalytic oxidation of methane, ethane and propane over a palladium oxide (PdO) surface was investigated experimentally by wire microcalorimetry. The oxidation rate was determined for each reactant at atmospheric pressure in the temperature range of 600-800. K. The apparent kinetic parameters were extracted from the experimental measurements. It is shown that the oxidation of these hydrocarbons over the PdO surface proceeds with a similar mechanism: they undergo dissociative adsorption followed by the conversion of surface fragments to final products. A detailed surface reaction model is proposed, and the kinetic parameters of the crucial reactions are deduced from the present experimental observations. The catalytic oxidation rates are found to increase in the order of methane, ethane and propane. This observation is consistent with density functional theory calculations and may be correlated with the C-H bond energies of the corresponding surface intermediates.

Original languageEnglish (US)
Pages (from-to)1048-1054
Number of pages7
JournalCombustion and Flame
Volume161
Issue number4
DOIs
StatePublished - Apr 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Keywords

  • Alkane oxidation
  • Catalytic combustion
  • Pd-based catalyst
  • Surface chemistry model

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