Author:
Wong Edgar L.,Potter Andrew E.
Abstract
A mass-spectrometric stirred-reactor technique was used to study the reaction of atomic oxygen with methane with low concentrations of molecular oxygen. An overall rate constant for oxygen-atom disappearance due to added methane was obtained for the temperature range 375 to 576°K. This rate constant was 4 × 1014 exp (− 10 000/RT) cm3 mole−1 s−1 and was compared with a previous rate constant for this reaction that had been measured in the presence of a large excess of molecular oxygen. This comparison showed that the presence of an excess of molecular oxygen produced a considerable increase in oxygen-atom consumption at low temperatures, but only a small increase at high temperatures. From product analyses, the stoichiometry of the reaction could be approximately represented by [Formula: see text]From the reaction stoichiometry and the rate constant for the oxygen-atom disappearance, the rate constant for methane disappearance was calculated to be 1 × 1014 exp (− 10 000/RT) cm3 mole−1 s−1. The presence of excess molecular oxygen has very little effect on this rate constant, contrary to the result found for the disappearance of atomic oxygen.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
34 articles.
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