API PUBL 4646-1996

$30.55

Evaluation of Fuel Tank Flammability of Low RVP Gasolines

Published By	Publication Date	Number of Pages
API	1996	132

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Description

The changes in fuel properties brought on by the reformulation of gasoline to reduce VOC emissions in urban areas with severe ozone problems have raised concerns about potential impacts on the flammability of hydrocarbon vapors in closed storage vessels such as automobile fuel tanks. A desire to define the effects of reformulated gasoline (RFG) on flammability temperature limits prompted this study. Several experiments were performed to evaluate the conditions under which the vapors from reformulated gasoline (RFG) contained in automobile fuel tanks become flammable. The program was conducted with 22 test fuels that had been systematically varied with respect to Reid vapor pressure (RVP), pentane-to-butane ratio, and addition of ethanol and MTBE. In Phase I, vapor pressures were measured for each test fuel over a 15 to 130&#176F temperature range. In addition, the upper and lower temperature limits of flammability were measured for each fuel. Phase II involved measurements of the concentrations of hydrocarbons in the vapor phase and an assessment of stratification.

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