The role of hydroperoxide radicals in the processes of chain combustion

Based on the experimental data reported in this work and available in the l iterature, the reactions of HO2. radicals are considered that are responsib le for a number of unknown or poorly studied specific features of chain com bustion, including the absence of the second ignition limit in some combust ible gaseous mixtures, heterogeneous chain propagation and unusual kinetic regularities of combustion processes caused by heterogeneous chain propagat ion, the third ignition limit, which was so far considered a non-chain phen omenon, and its hysteresis. The experimental data are discussed that point to the importance of the reactions of intermediate species between each oth er.