Effect of condensed products of silane combustion on a low-pressure oxyhydrogen flame

The kinetics of branching-chain oxidation of monosilane and hydrogen at and near the first explosion limit at temperatures within 630–850 K and pressures below 1 torr was studied. Atomic hydrogen and oxygen were observed in the silane-oxygen reaction zone. The effects of the reactor walls treated with silane-lean (1: 9: 10) and silane-rich (1: 1: 3) SiH4-O 2-He mixtures on the parameters of oxyhydrogen ignition were different. This modification of the surface was of long-term character. Water vapor was absorbed on the hot reactor walls treated with explosions of the silane-rich mixture. Such a surface was demonstrated to affect the combustion of oxyhydrogen, inducing pulsating combustion.