Abstract
The so-called low pressure glow and explosion limits of the water-catalysed reaction between carbon monoxide and oxygen have been studied using a photomultiplier to obtain light intensity/time graphs. The results show no sign of a glow limit, and little discontinuity at the explosion limit. The effects of mixture composition, changes of surface, vessel packing, addition of inert gases and replacement of protium by deuterium oxide have been investigated. It is suggested that the reaction involves degenerate chain branching and the formation of a semi-stable intermediate, and that diffusion of radicals to the walls is not the most important step in chain termination.
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