Abstract
Sulfuric acid is formed by combustion of fuel containing small amounts of sulfur compounds. The present studies are mainly concerned with fuel additives, which is added to fuel in order to suppress formation of sulfuric acid.
Lamp method (JIS K 2421) which determine thiophene in benzen was used to estimate the suppressive effect of various fuel additives.
Various fuel additives were added in 2% concentrations to the fuel containing 16.915g of thiophene in 1l benzen-methanol mixture (volume ratio 1:4). The gas produced by burning 10 ml of fuel prepared as above was absorbed by 0.5 M-Na2CO3 aqueous solution and was determined for SO4-2 as BaSO4.
Among fuel additives studied, phenols, phosphoric acid ester derivatives, and amines such as urea showed excellent suppressive effects on formation of sulfuric acid.
