The inhibition of the co/h2o/o2reaction by trace quantities of hci

J. F. Roesler, R. A. Yetter, F. L. Dryer

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The inhibition of the CO/H2O/O2reaction by small quantities of HCI was studied in a high temperature, atmospheric pressure flow reactor at temperatures near 1000K. The initial species concentrations of the CO/H2O/O2reaction bath were kept constant at about l%/0.6%/0.5% respectively, while the initial concentration of HCI was varied from 0. to 200 ppm. These mixtures provided a stoichiometry close to unity with a Cl/H ratio ranging from 0. to 0.016. Results indicated that these small Cl/H ratios can significantly inhibit both the induction time and the reaction rate of CO oxidation. The concentration of HCI was measured by an FTIR spectrometer and was observed to vary throughout the reaction. The mole fraction of HCI was observed to decrease until approximately 50% of the CO was consumed and to slowly rise afterwards. The inhibitory effect of HCI on the CO oxidation rate was observed to decrease after the minimum measured HCI concentration. The experimental results were compared with a reaction model published in the literature and showed significant discrepancy.

Original languageEnglish (US)
Pages (from-to)87-100
Number of pages14
JournalCombustion science and technology
Issue number1-6
StatePublished - Mar 1 1992

All Science Journal Classification (ASJC) codes

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


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