Time scale analysis of the homogeneous flame inhibition by alkali metals

A time scale analysis of the homogeneous flame inhibition problem is carried out to identify main parameters controlling gas phase chemical interaction alkali metal inhibitors with chemistry. First, kinetic sub-models for metals are analyzed show that a simplified 2-step cycle can capture essential features this interaction. Second, it shown auto-catalytic, which explains high efficiency in inhibiting flames even at low concentrations. Third, scales associated linked free termination via non-dimensional parameter characterizing an inhibitor promoting radical scavenging. It accounts trends observed literature and also be used provide estimates suppression limit.