| Autor: |
Sablina, Z. A., Gureev, A. A., Kukushkin, A. A., Melent'eva, N. I., Énglin, B. A., Fomina, A. M., Gryaznov, A. P. |
| Zdroj: |
Chemistry and Technology of Fuels and Oils; December 1970, Vol. 6 Issue: 12 p932-934, 3p |
| Abstrakt: |
1.The high-temperature properties of jet fuels may change during storage; the extent of these changes will vary widely, depending on the fuel composition and on the storage conditions.2.The following general trends have been noted in the changes in the high-temperature properties of fuels during storage: The temperature at which insoluble products start to form rapidly is reduced by 10–20° C; there is a corresponding reduction in the limiting temperature for use in the engine, and the thermal stability in the high-temperature region (180° C) becomes poorer. As a rule, the thermal stability of a fuel decreases more rapidly in the initial storage period than in subsequent periods; in some cases, the thermal stability of a fuel will remain essentially unchanged after 3 years of storage.3.The nature of the changes in the high-temperature properties of fuels depends on the fuel composition and type: T-1 fuels tend primarily to increase in tendency to form potential gum (oxidation at 150° C) and to become poorer in thermal stability. TS-1 fuels show primarily changes in corrosivity (at 120° C), largely because of mercaptan oxidation.4.Changes in the high-temperature properties of straight-run fuels during storage are a consequence of oxidation of the most chemically active constituents and the related development of corrosion processes. The resulting products, present in the fuel in a soluble, colloidal, or suspended state, will separate rapidly from the fuel at elevated temperatures, in the form of sediment and deposits. The corrosive action of aggressive compounds also increases at elevated temperatures. |
| Databáze: |
Supplemental Index |
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