Role of ozone doping in the explosion limits of hydrogen-oxygen mixtures: Multiplicity and catalyticity

Wenkai Liang, Yiru Wang, Chung K. Law

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Effects of ozone doping on the Z-shaped explosion boundary of stoichiometric hydrogen-oxygen mixtures are computationally studied. Results show that with increasing ozone doping and within a small range of increment, the explosion limit transitions from the Z-shaped response with two turning points to responses exhibiting four, six, four, two and none turning points. By modifying the rate coefficients of the sensitive reactions within the ozone sub-mechanism, four reactions are identified to control the above highly non-monotonic behavior, and that the system transitions to the H2[sbnd]O3 chemistry as the limit becomes monotonic and overall more explosive. The practical implication is that there exists a critical range of ozone doping such that the mixture is more sensitive to unstable burning for lower levels of doping, with the associated multiple transition states, while the facilitating role of ozone catalyticity is fully realized with just slightly higher levels of doping, resulting in overall stronger explosive burning.

Original languageEnglish (US)
Pages (from-to)7-10
Number of pages4
JournalCombustion and Flame
StatePublished - Jul 2019

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • General Physics and Astronomy


  • Explosion limits
  • Hydrogen
  • Ozone


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