Long-term storage stability of diesel fuels

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6003776

Martin, B; Bocard, C; Durand, J P; Bigeard, P H; Denis, J; Dorbon, M; Bernasconi, C

Storage stability of different diesel fuels containing cat-cracked stocks was examined using various aging conditions. The degradation of fuel during storage was monitored through insoluble formation but also through reaction of nitrogen compounds known to be involved in the fuel degradation process. The influence of aging in injector fouling tendency was also investigated on an IDI engine on test bench. Various stabilizer additives (tertiary amines, dispersant...) were tested. Best results were obtained with dispersant which prevent sediment agglomeration making them able to cross the filter mesh. Additives limit indole evolution without inhibiting completely sediment formation, proving that other reactions take place. This paper shows that fuel oxidability is no modified by additives. None of the tested formulations is effective on fuel darkening. After aging, surfactants remain effective on injector fouling. Another way of improving the storage stability of Diesel fuel is hydrotreatment. A fuel was hydrotreated at different severity levels and the effect on stabilization was shown. It was demonstrated that hydrotreating makes it possible to achieve more complete stabilization than using additives. Particularly color stability is considerably improved after hydrotreatment. Stabilization was achieved for mild operating conditions for which hydrodenitrification is not complete, only indoles are transformed. To inhibit fuel degradation, hydrotreatment should reduce other sediment precursors than nitrogen compounds. The authors demonstrated that hydrotreating renders fuels more sensitive to oxidation.

• OSTI ID: 6003776
• Report Number(s): CONF-9010205-
• Resource Relation: Conference: 1990 Society of Automotive Engineers (SAE) international fuels and lubricants conference and exposition, Tulsa, OK (United States), 22-25 Oct 1990; Other Information: Technical Paper SAE 902174
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
33 ADVANCED PROPULSION SYSTEMS
DIESEL FUELS
FUEL ADDITIVES
HYDROCRACKING
STORAGE
FUEL INJECTION SYSTEMS
FOULING
AGING
AIR POLLUTION CONTROL
AMINES
CATALYTIC CRACKING
NITROGEN COMPOUNDS
SEDIMENTS
ADDITIVES
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUEL SYSTEMS
FUELS
GAS OILS
LIQUID FUELS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
POLLUTION CONTROL
PYROLYSIS
THERMOCHEMICAL PROCESSES
022000* - Petroleum- Transport
Handling
& Storage
330102 - Internal Combustion Engines- Diesel
020400 - Petroleum- Processing
330700 - Advanced Propulsion Systems- Emission Control