CO formation in the thermal decomposition of CH3ONO at high temperatures: Kinetic modeling of the CH3O decomposition rate

T. K. Choudhury, Y. He, W. A. Sanders, Ming-Chang Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

CH3ONO was pyrolyzed in two different temperature regimes in order to determine the kinetics of the CH3O decomposition reaction. A static reactor operating between 550 and 770 K was used for the first set of experiments, with analysis of products (CO, CH2O, and CH3OH) by FTIR absorption. In the second set of experiments, a shock tube operating in the range 1000-1600 K was employed and the CO product was measured by resonance absorption of the output of a stabilized CW CO laser. Kinetic modeling of CO product yields over the full range of temperature (550-1660 K) allowed us to obtain for the first time the rate constant for the decomposition of CH3O: CH3O + M → H + CH2O + M (8), k8 = (5.45 ± 0.63) × 1013 exp(-6794 ± 102/T) cm3/(mol·s), where M = Ar or He, and the error limits represent only the internal consistency of the modeled values. Theoretical implications of this result are discussed.

Original languageEnglish
Pages (from-to)2394-2398
Number of pages5
JournalJournal of Physical Chemistry
Volume94
Issue number6
DOIs
StatePublished - 1 Dec 1990

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