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Problems Related to Fuel Additives

Although not common, fuel additives can cause problems in fuel systems. The problems often are due to the following  [Pg.168]

When cooled or contaminated, hindered phenolic antioxidants and some PDA antioxidants are known to precipitate from solution as concentrated compounds. At temperatures below 60°F (15.5°C), some antioxidants will begin to crystallize and drop from their solvent carrier as relatively pure materials. [Pg.168]

Fortunately, upon warming to temperatures of 75°F to 100°F (23.9°C to 37.8°C), these crystals will dissolve and return back into the solvent carrier. The performance of the antioxidant is usually not adversely affected by this process. [Pg.168]

These antioxidants are also sensitive to contamination by impurities such as rust, dirt, or some other material. The presence of these impurities can initiate the formation of an antioxidant seed crystal. Once a seed crystal forms within the concentrated additive, it can cause the volume of stored product to crystallize. For this reason, keeping antioxidants free of contamination helps to ensure product integrity and performance. [Pg.168]

Phenylenediamine (PDA) type antioxidants are naturally very dark in color. If used in water white fuels such as kerosene, 1 diesel, or even certain hydrocarbon solvents, the color can be degraded to failing Saybolt color values. [Pg.168]


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