Promoting effect of halogen- and phosphorus-containing flame retardants on the autoignition of a methane–oxygen mixture

Resumo

This paper presents a numerical and experimental study of the effect of flame-retardant additives on the autoignition of methane behind shock waves. It is shown that at a temperature of 1300–1900 K, the compounds CCl₄, CF₃H, and (CH₃O)₃PO not only do not suppress ignition but significantly reduce the induction time of methane–oxygen mixtures. A kinetic mechanism is proposed which relates the promoting effect to the reactivity of the pyrolysis products of the additives.