Conventional paraffin based jet fuels are solely derived from petroleum and are, in addition to serving as the fuel source, designed to act as coolants for the engines and electrical parts of the aircraft at temperatures up to 300°C. A refined chemical oil and two hydro-treated products with varying contents of aromatic, hydroaromatic, and naphthenic compounds were characterized and probed for their thermally stable properties. The various chemical compositions of the hydrotreated pyrolysis products were tested for their function as thermally stable jet fuels in the pyrolytic regime. A jet fuel derived from the refined chemical oil, obtained from coal pyrolysis was thermally stable up to 771°C in a flow-reactor. Compared to the petroleum-derived jet fuel, JP-8P, that showed extensive thermal cracking at these temperatures, the coal-derived jet fuel was superior in suppressing the formation of solid deposit in the fuel line.
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