Kinetics of CO and H atom production from the decomposition of HNCO in shock waves

C. H. Wu, H. T. Wang, Ming-Chang Lin*, R. A. Fifer

*Corresponding author for this work

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19 Scopus citations

Abstract

The production of CO and H atoms from the thermal decomposition of HNCO in shock waves at temperatures between 2120 and 2570 K has been measured by resonance absorption. Kinetic modeling of these product formation rates using a recently established mechanism yielded the second-order rate constants for the primary decomposition processes HNCO + Ar → NH + CO + Ar (1) and HNCO + Ar → H + NCO + Ar (2): k1 = 1015.41±0.16 exp(-39800 ± 700/T) cm3/(mol·s) and k2 = 1017.0 exp(-56400/T) cm3/(mol·s). The values of k1 determined in this work agree quantitatively with those reported recently by Hanson, Bowman, and co-workers. Combination of these two sets of data gives rise to the Arrhenius expression k1 = 1015.925±0.085 exp(-42640 ± 450/T) cm3/(mol·s) for 1830 K ≤ T ≤ 3340 K.

Original languageEnglish
Pages (from-to)3344-3347
Number of pages4
JournalJournal of physical chemistry
Volume94
Issue number8
DOIs
StatePublished - 1 Dec 1990

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