High-pressure laminar flame speeds and kinetic modeling of carbon monoxide/hydrogen combustion

Hongyan Sun, S. I. Yang, G. Jomaas, C. K. Law

Research output: Contribution to journalConference articlepeer-review

320 Scopus citations


Laminar flame speeds were accurately measured for CO/H2/air and CO/H2/O2/helium mixtures at different equivalence ratios and mixing ratios by the constant-pressure spherical flame technique for pressures up to 40 atmospheres. A kinetic mechanism based on recently published reaction rate constants is presented to model these measured laminar flame speeds as well as a limited set of other experimental data. The reaction rate constant of CO + HO2 → CO2 + OH was determined to be k = 1.15 × 105-T2.278 exp(-17.55 kcal/RT) cm 3 mol-1 s-1 at 300-2500 K by ab initio calculations. The kinetic model accurately predicts our measured flame speeds and the non-premixed counterflow ignition temperatures determined in our previous study, as well as homogeneous system data from literature, such as concentration profiles from flow reactor and ignition delay time from shock tube experiments.

Original languageEnglish (US)
Pages (from-to)439-446
Number of pages8
JournalProceedings of the Combustion Institute
Volume31 I
Issue number1
StatePublished - 2007
Event31st International Symposium on Combustion - Heidelberg, Germany
Duration: Aug 5 2006Aug 11 2006

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Mechanical Engineering
  • Physical and Theoretical Chemistry


  • Kinetics
  • Laminar flame speeds
  • Reaction mechanism


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