Kinetic study of two-stage lowerature heat release in isooctane autoignition

Wendi Dong, Wenkai Liang, Chung K. Law

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Recognizing that lowerature ignition of alkanes is usually associated with one heat release peak, we report herein that, for iso-octane under certain ranges of initial temperatures and pressures, two separate heat release peaks were observed through computational simulations using several kinetic mechanisms. The inherent chemical reason for this phenomenon is discussed using reaction channel analysis and is identified to result from the competition between R + O2 → RO2 and the β scission reactions. By further utilizing sensitivity and path flux analyses, an isomeric effect is identified in that the different isomeric structures produced through the H-abstraction reactions can lead to differences in the subsequent lowerature reaction pathways.

Original languageEnglish (US)
Pages (from-to)1374-1383
Number of pages10
JournalJournal of Physical Chemistry A
Issue number6
StatePublished - Feb 18 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry


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