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Radiotracer Study of Turbine Aircraft Fuel Stability.

PB198825

Publication Date	1971
Personal Author	Whisman, M. L.; Cotton, F. O.; Goetzinger, J. W.; Ward, C. C.
Page Count	34
Abstract	A radiotracer method was developed for detecting the contribution of selected components and additives to thermally induce deposits of turbine aircraft fuels. Fuels were examined before and after 52 weeks of storage at 130F. Of particular concern was the influence of aromatic hydrocarbon fuel constituents on thermal-stability quality of jet fuels during storage. A microfuel coker test apparatus was used to thermally stress the test fuels and blends, and the resultant contribution to deposits of selected fuel components, labeled with carbon-14, was determined by radioactive-counting techniques. Ninety-one blends of five test fuels with carbon-14-labeled fuel additives or components were prepared, tested, stored and reanalyzed for deposit-forming tendency. These additives included two anti-oxidants, a metal deactivator and a corrosion inhibitor. Of the labeled hydrocarbon fuel systems studied, the greatest reaction was observed in blends containing methyl- and ethyl-substituted indenes. Other aromatic types also showed some contribution to the deposits. A resol antioxidant, however, barely contributed to deposit formation. Oleic acid interacted with cadmium present in aircraft fuel systems and produced deleterious effects upon the thermal-stability quality of the fuel. (Author)
Keywords	Jet engine fuels Fuel additives Aviation fuels Thermal stability Deposits Decomposition Labeled substances Fuel storage Cresols Carbon 14 Tests Antioxidants Phenylenediamines Amines Oleic acid Corrosion inhibitors Impurities Iron oxides Rust
Source Agency	Invalid Source Agency Code
NTIS Subject Category	81D - Jet & Gas Turbine Engines
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197113

Radiotracer Study of Turbine Aircraft Fuel Stability.

Radiotracer Study of Turbine Aircraft Fuel Stability.
PB198825

Publication Date	1971
Personal Author	Whisman, M. L.; Cotton, F. O.; Goetzinger, J. W.; Ward, C. C.
Page Count	34
Abstract	A radiotracer method was developed for detecting the contribution of selected components and additives to thermally induce deposits of turbine aircraft fuels. Fuels were examined before and after 52 weeks of storage at 130F. Of particular concern was the influence of aromatic hydrocarbon fuel constituents on thermal-stability quality of jet fuels during storage. A microfuel coker test apparatus was used to thermally stress the test fuels and blends, and the resultant contribution to deposits of selected fuel components, labeled with carbon-14, was determined by radioactive-counting techniques. Ninety-one blends of five test fuels with carbon-14-labeled fuel additives or components were prepared, tested, stored and reanalyzed for deposit-forming tendency. These additives included two anti-oxidants, a metal deactivator and a corrosion inhibitor. Of the labeled hydrocarbon fuel systems studied, the greatest reaction was observed in blends containing methyl- and ethyl-substituted indenes. Other aromatic types also showed some contribution to the deposits. A resol antioxidant, however, barely contributed to deposit formation. Oleic acid interacted with cadmium present in aircraft fuel systems and produced deleterious effects upon the thermal-stability quality of the fuel. (Author)
Keywords	Jet engine fuels Fuel additives Aviation fuels Thermal stability Deposits Decomposition Labeled substances Fuel storage Cresols Carbon 14 Tests Antioxidants Phenylenediamines Amines Oleic acid Corrosion inhibitors Impurities Iron oxides Rust
Source Agency	Invalid Source Agency Code
NTIS Subject Category	81D - Jet & Gas Turbine Engines
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197113