Effect of processes at the reactor surface on the low-pressure hydrogen f lame

Abstract

The interaction of the low-pressure flame of a 2H2-O2 mixture with a quartz reactor surface was studied by the resonance fluorescence technique. The results confirmed the fundamental statement of N. N. Semenov’s theory concerning chain propagation in the gas and termination on the surface in the kinetic region of chain termination (quadratic decay in the heterogeneous negative chain interaction) and in the diffusion region (linear decay). The kinetic curves observed in the kinetic and diffusion chain termination regions on the wall were well matched using N. N. Semenov’s theory, taking into account the heterogeneous catalytic chain initiation and interaction processes occurring on the wall with a variable “rate constant.” The interaction of chains on the wall markedly retards ignition in the gas in the kinetic region and has almost no influence on chain propagation in the gas in the diffusion region of the heterogeneous chain termination.