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Mechanism of isotope exchange reaction between methane and deuterium

✍ Scribed by W. C. Gardiner JR.; J. M. Herrmann; W. G. Mallard; J. H. Owen

Publisher: John Wiley and Sons
Year: 1976
Tongue: English
Weight: 636 KB
Volume: 8
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550080112

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✦ Synopsis

The rate of CHI disappearance in a shock-heated CHI: Dz: Ar = 9.70: 9.86: 80.44 mixture was monitored by coincidence absorption of the 2948 cm-I He-Ne laser line over the shockfront temperature range of 1900-2300K. Comparison with CHr pyrolysis results by means of computer simulations suggested that atom and free radical chains are responsible for the homogeneous D/H exchange reaction on CHI.

Additional simulations for the experimental conditions of previous single-pulse shock tube experiments led to the recognition of a high sensitivity of the exchange rate to trace amounts of hydrocarbon impurity and to the dissociation rate of CH,.

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