Thermal decomposition kinetics of the thermally stable jet fuels JP-7, JP-TS and JP-900

Published

April 3, 2014

Author(s)

Raina V. Gough, Jason A. Widegren, Thomas J. Bruno

Abstract

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.

Citation

Energy & Fuels

Volume

28

Pub Type

Journals

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DOI Link

Citation

Gough, R. , Widegren, J. and Bruno, T. (2014), 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 November 27, 2024)