The Effect of Icing Inhibitor Additives on the Flash Point of Hydrocarbon Fuels,
NAVAL RESEARCH LAB WASHINGTON D C
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A recent report of research at the Shell Thornton Research Centre in Chester England described some interesting vapor pressure and flash point work for kerosene and JP-5 type jet fuels. The Shell researchers measured the effect of temperature, vaporliquid ratio ullage, and icing inhibitor additives on the vapor pressure and flash point of some jet fuels. They found that the average vapor pressure of fuels containing small concentrations of ethylene glycol monomethyl ether methyl cellosolve icing inhibitors was significantly higher than those fuels which did not contain the inhibitor. The Military Specifications for JP-4 and JP-5 jet fuels require the use of from 0.1 to 0.15 icing inhibitor additive in JP-4, but none is permitted in JP-5. It was chosen to study this effect on JP-5 jet fuel. Flash point determinations were made by means of a Tag Closed Cup Tester within the concentration range of 0 to 1 icing inhibitor. The results showed the depression of flash point temperature with increasing additive concentration.
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