Abstract
Using experimental data available in the literature the impact of the molecular structures of cycloalkanes and aromatic hydrocarbons on the auto-ignition temperature is analyzed. Based on contemporary studies of auto-ignition kinetic processes of cyclic nonaromatic and aromatic hydrocarbons, the connection between chemical structure, bond strength in the molecule and features of radical mechanisms of oxidation processes with the auto-ignition temperature is shown. It is noted that unsubstituted cycles usually have the highest auto-ignition temperature. The increase in the structure of substituents the number of methyl groups and double bonds capable to conjugate with benzene ring contributes to an index increase. Alkyl side chains located in the ortho-position, as well as the elongation of the chain of alkyl radicals attached to the ring, reduce the auto-ignition temperature. Polycyclic aromatic structures have a lower auto-ignition temperature than structurally similar benzene derivatives.
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