Investigation on the oxidation chemistry of methanol in laminar premixed flames

Xiaoyuan Zhang, Guoqing Wang, Jiabiao Zou, Yuyang Li*, Wei Li, Tianyu Li, Hanfeng Jin, Zhongyue Zhou, Yin Yu Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

In this work, oxidation chemistry of methanol was investigated in laminar premixed flames. Laminar burning velocities of methanol/air mixtures at 423 K and 1–10 atm were measured in a spherical combustion vessel, extending the range of equivalence ratio up to 2.1. A stoichiometric premixed flat flame of methanol/O2/Ar at 0.04 atm was also conducted using synchrotron VUV photoionization mass spectrometry (SVUV-PIMS) to obtain more detailed kinetic information. Particularly, fuel-derived radicals including methoxy radical and hydroxymethyl radical were observed, while formaldehyde (CH2O) and formic acid (HOCHO) were identified as the abundantly produced intermediates in methanol flame. A methanol model was developed and validated against the experimental data obtained in this work, as well as in literature. In the predictions of laminar burning velocities, HO2 radical plays an important role under very rich conditions. Besides, the measurement of formaldehyde and formic acid in methanol flame is helpful to constrain the rate constant of CH2OH + O2 = CH2O + HO2, which presents large uncertainties at high temperatures.

Original languageEnglish (US)
Pages (from-to)20-31
Number of pages12
JournalCombustion and Flame
Volume180
DOIs
StatePublished - 2017

Keywords

  • Kinetic model
  • Laminar burning velocities
  • Laminar premixed flat flame
  • Methanol
  • SVUV-PIMS

ASJC Scopus subject areas

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

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