Ignition, halogen compounds

Preflame and Ignition Studies. The studies were carried out with twice stoichiometric fuel-air mixtures. When a halogen compound was present in a fuel, the flow rate of the fuel stream was adjusted to maintain the hydrocarbon-to-air ratio at twice stoichiometric. 

The nature of the base fuel also influenced the response to halogen compounds. For instance, although isooctane and ethylbenzene both oxidize and ignite within almost the same temperature range, ethyl iodide markedly promoted the oxidation and ignition of isooctane, but with ethylbenzene it only promoted oxidation, while inhibiting ignition. 

The effectiveness of the halogen compounds depended on the particular halogen concerned the promoting effect on oxidation increased in the order chlorine compounds < bromine compounds < iodine compounds. Although iodine compounds were the most effective in promoting oxidation, their effect on ignition was often less than that of bromine compounds, and as mentioned earlier, they sometimes inhibited ignition. 

These studies provide comprehensive information on the effects of many halogen compounds on the combustion behavior of various hydrocarbons. The combustion behavior included preflame oxidation, ignition over a wide range of temperature, and the flame process. The effect of iodine compounds on preflame combustion, which had not been previously investigated, is now reported. 

The powdered alloy ignites when dropped into the vapour. See Other A-HALOGEN COMPOUNDS, iV-OXIDES... 

VANADIUM SESQUIOXIDE (1314-34-7) O3V2 On exposure to air it is gradually converted into vanadium tetraoxide may self-ignite in hot air. Material is a chemical base. Inconq)atible with calcium, chlorine, lithium and halogenated compounds such as chlorine trifluoride. 

AMINATE BASE (79-17-4) This substance is an oxoacid and organic acid. Shock, friction. sparks, elevated temperatures may cause ignition or explosion. Violent reaction with acids. Incompatible with organic anhydrides, isocyanates, vinyl acetate, acrylates, substituted allyls, alkylene oxides, epichlorohydrin, halogenated compounds, ketones, aldehydes, alcohols, glycols, phenols, cresols,... 

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