Thermal decomposition kinetics of the thermally stable jet fuels JP-7, JP-TS and JP-900
Raina V. Gough, Jason A. Widegren, Thomas J. Bruno
The global thermal decomposition kinetics of JP-7, JP-TS and JP-900 were studied. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless-steel ampule reactors. At each temperature, the extent of decomposition as a function of time was determined by analyzing the thermally stressed liquid phase by gas chromatography. These data were used to derive global pseudo-first-order rate constants that approximate the overall rate of decomposition of the fuel. For JP-7, the rate constants ranged from 1.79 × 10−5 s−1 at 375 °C to 3.02 × 10−4 s−1 at 450 °C. For JP-TS, the rate constants ranged from 1.74 × 10−5 s−1 at 375 °C to 2.70 × 10−4 s−1 at 450 °C. For JP-900, the rate constants ranged from 1.03 × 10−5 s−1 at 375 °C to 3.60 × 10−4 s−1 at 450 °C. At all temperatures studied, these three fuels have similar rate constants for thermal decomposition; with one exception, the values of k are identical within the combined uncertainty. The rate constants for the decomposition of RP-2, a fuel being considered as a replacement fuel for hypersonic vehicles, are similar in the temperature range studied. On the basis of the amount of time required for 1% of the sample to decompose (t0.01), we found that allowable instrument residence times ranged from 16 min at 375 °C to 30 sec at 450 °C. The rate constants measured here, as well as the Arrhenius parameters that we calculate, can be used for the design and planning of physical property measurements at additional temperatures.
, Widegren, J.
and Bruno, T.
Thermal decomposition kinetics of the thermally stable jet fuels JP-7, JP-TS and JP-900, Energy & Fuels, [online], https://doi.org/10.1021/ef500338n
(Accessed June 5, 2023)