The influence of iodinated fire suppressants on shock-induced ignition of acetylene– and methane–oxygen mixtures

In this work, the influence of additives of iodinated hydrocarbons trifluoroiodomethane (CF₃I) and 1-iodoperfluoropropane (C₃F₇I) on shock-induced ignition of acetylene and methane was experimentally investigated. The observed temperature dependencies of induction times indicate that both suppressants show noticeable inhibiting activity in acetylene, but reduce the ignition delay time in methane, similarly to previously studied halogenated fire suppressants CCl₄, CF₃H, and C₂F₄Br₂.