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- W1999446312 abstract "A variety of methane and oxygen mixtures were oxidized in acid-washed Pyrex and silica vessels, mostly at temperatures between 500° and 550°C. The resultant mixtures were analyzed after varying reaction times for the reactants and the chief products (except water), i.e., carbon monoxide, carbon dioxide, and formaldehyde. Assuming that methane was chiefly oxidized as a result of reaction with hydroxyl radicals and that formaldehyde and carbon monoxide reacted either with hydroxyl radicals or hydroperoxy radicals (all of which reactions are exothermic), comparative rates of reaction were obtained. This method of comparison depends on less assumptions than the “steady state” treatment used by Semenov. The results were shown to be in agreement with a value of 2.1 for the relative rates of reaction of hydroxyl radicals with methane and carbon monoxide at 525°C and suggest a higher value at temperatures of 650° and 750°C. A value of 33±3 was obtained for the relative rates of reaction of hydroxyl radicals with formaldehyde and methane at 500°C. Hydroperoxy radicals were shown to react 340±80 times faster with formaldehyde than with carbon monoxide at 525°C. Direct reaction of formaldehyde with oxygen was shown to be slow compared with the other reactions considered except in the early stages when some direct (presumably heterogeneous) formation of carbon dioxide was observed." @default.
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- W1999446312 date "1965-01-01" @default.
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- W1999446312 title "Rates of radical reactions in methane oxidation" @default.
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- W1999446312 doi "https://doi.org/10.1016/s0082-0784(65)80191-6" @default.
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