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- W2912124713 abstract "The thermal stability of jet fuels, particularly in the pyrolytic regime, can be greatly enhanced by utilizing hydrogen donors typically found in coal-derived liquids (1, 2). The current jet fuels are petroleum-derived and consequently rich in linear alkanes, which are highly susceptible to pyrolytic cracking. The addition of hydrogen donors have resulted in a marked increase in the thermal stability of linear alkanes when stressed under non-oxidative batch conditions (3, 4). An additional problem with jet fuels is the presence of dissolved oxygen (from air), which may react with the fuel in the autoxidative regime around 150-250° C before the fuel and its oxygenated reaction products enter the pyrolytic regime above 400°C (5-7). Although the pyrolytic conversion of alkanes in petroleum-derived jet fuels, which involves the formation of free radicals, can be halted right after the initiation step by the use of hydrogen donors, oxygen may react with the hydrogen donors reducing their ability to target the thermally induced radicals. Accordingly, the present study focuses on the degradation of n-tetradecane, as a model paraffinic jet fuel, stressed alone and with the addition of the hydrogen donor 1,2,3,4-tetrahydro-1-naphthol under non-oxidative and oxidative flow conditions, obtained by purging with nitrogen and air, respectively. The thermal stability of the model paraffinic jet fuel, with and without the hydrogen donor, was compared with the model naphthenic jet fuel, decahydronaphthalene, under non-oxidative and oxidative flow conditions. The hydrogen donor greatly reduced the thermal cracking of the n-tetradecane when stressed under nitrogen with bulk fuel exit temperatures from the flow reactor tube in the range of 500 to 700°C. The effect of the hydrogen donor on the stabilization of n-tetradecane was markedly reduced under oxidative conditions. However, the decahydronaphthalene showed comparable thermal stability both under nitrogen and air." @default.
- W2912124713 created "2019-02-21" @default.
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- W2912124713 date "2000-08-20" @default.
- W2912124713 modified "2023-09-27" @default.
- W2912124713 title "Effect of hydrogen donor on the thermal stability of paraffinic jet fuels compared with naphthenic jet fuels under oxidative and non-oxidative flow conditions." @default.
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