Reducing deposits and smoke from jet fuels with additives incorporating an ammonium salt

摘要

Smoke and ash deposit formation in commercial and military jet engines and power plants is minimized by inclusion in the fuel of an additive comprising oil-soluble salts of a transition metal, such as manganese or iron, and an alkaline earth metal together with an oil-soluble ammonium salt. A preferred additive comprises methylcyclopentadienyl manganese tricarbonyl and calcium alkylphenol sulfide in amounts to provide a manganese/calcium weight ratio about 5/1. Dosage of the mixed metals is preferably within the range from 200 to 600 ppm. with dosage of ammonium ion within the range from 10 to 100 ppm.