Abstract
Abstract : Work on ionization in flames and related subjects such as combustion and pyrolysis is critically reviewed. It is assumed that saturated hydrocarbons and high molecular weight unsaturated hydrocarbons produce acetylene and the acetylene-oxygen mixture is responsible for the production of the most abundant ion. This assumption is justified by subsequent literature survey. Acetylene undergoes further chemical changes producing the CH radical which is directly responsible for the production of the most abundant ion. The probable chain reactions for the production of the CH radical are proposed. The mechanism of the formation of the most abundant ion and less abundant ions are illustrated. The high ionization in hydrocarbon flames is shown to be caused by electronically excited species. Reasons for the lack of high ionization in carbon monoxide and hydrogen flames are discussed. (Author)
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