Chemistry for Thermal Degradation of Bicyclic Hydrocarbon Components of Jet Fuels in Pyrolytic Regime

摘要

High-temperature thermal stability is an important property of advanced jet fuels for future high-Mach aircraft because they will also be used to cool critical engine components and may be exposed to temperatures up to 482 ℃ (900°F) (1-3). It has been shown in our previous work that coal-derived jet fuels are more stable than petroleum-derived jet fuels at around 450 ℃ (4, 5). Thermal degraduation of petroleum-derived and coal-derived jet fuels in pyrolytic regime is chemically complex and involves many parallel and consecutive reactions. We have discussed the reaction mechanisms for pyrolytic decomposition of normall long-chain paraffine (6), cyclohexane and alkylcyclohexanes (7, 8), and the hydrogen-transferring pyrolysis of long-chain paraffine in the presence of hydrogen donors (9, 10). In this paper we discuss the relative stability of various hydrocarbons and reaction pathways for thermal degradation of cyclic hydrocarbons in pyrolytic regime.