On Mechanisms of Intensifying Combustion Due to the Simultaneous Excitation of Vibrational and Electronic States of Reacting Molecules

摘要

Excitation of the vibrational and electronic states of atoms and molecules increases their reaction capacity [1-4]. This effect is attributed to a decrease in the barrier of endoergic reactions and an increase in the interaction cross section for processes involving excited molecules. It has been shown that excitation of the molecular vibrations in H2 or of electronic states a1△g and b1Σ_g~+ in the O2 molecule reduces induction time and heat-release time, as well as the threshold of ignition in combustible mixtures H2(CH4) + O2 (air), due both to the promotion of chain reactions and to the appearance of new intense pathways for the formation of active atoms and radicals [5, 6]. Simultaneous excitation of the electron and vibrational states of the reacting molecule, e.g., the molecular vibrations in O2 in the electronically excited state a1△g or b1Σ_g~+, may lead to the multiplicative effect on the combustion process.