Chemical kinetic modeling was used to simulate the autoxidation of jet
fuel including the chemistry of peroxy radical inhibiting antioxidant
s and hydroperoxide decomposing species. Recent experimental measureme
nts of oxygen concentration during autoxidation of model hydrocarbon s
olvents were used to ''calibrate'' the rate parameters of the mechanis
m. The model showed good agreement with oxygen profiles of static meas
urements at 140 degrees C, At this temperature, the model predicts lar
ge increases in oxidation rate upon peroxy radical inhibiting antioxid
ant consumption to below 1 x 10(-5) M. At 185 degrees C we have shown
that peroxy radical inhibiting antioxidants and hydroperoxide decompos
ers both slow and/or delay oxidation, but the resulting oxygen profile
s display different characteristics. We have shown that comparison of
these profiles with fuel blending and fuel dilution measurements has t
he potential to differentiate between the two types of oxidation-slowi
ng species. The modeling predicts that the presence of both types of s
pecies in a fuel results in a synergistic behavior.