轻柴油的氧化及其与组成的关系

考察了按照不饱和烃含量不同而芳香烃含量近似、芳香烃含量不同而不饱和烃含量近似的要求配制的3个系列27个0号轻柴油油样在95℃强化氧化条件下实际胶质质量浓度的变化规律。探讨了实际胶质的变化与不饱和烃和芳香烃含量之间的关系。结果表明:在95℃强化氧化条件下,0号轻柴油的实际胶质随氧化时间呈直线变化;0号轻柴油中不饱和烃是引起实际胶质变化的主要因素,在其他组成相近时,实际胶质变化率随不饱和烃含量增加呈二次曲线关系增大;0号轻柴油中的芳香烃对实际胶质变化有一定的影响,但是规律尚不明确。

The Oxidation of Light Diesel Fuels and Its Relationship with the Composition of Diesel Fuel

The changing tendency of the mass concentration of existent gum and the relationship between the contents of unsaturated hydrocarbons and aromatic hydrocarbons in 27 samples of 0# light diesel fuel under 95 ℃ consolidated oxidation situation are investigated.The samples have been concocted according to two principles:1) the contents of unsaturated hydrocarbons are different but the aromatic hydrocarbons are close,2) the contents of aromatic hydrocarbons are different but the unsaturated hydrocarbons are close.Results show that the existent gum increases linearly with time under 95 ℃ consolidated oxidation situation.Unsaturated hydrocarbons are the main factor to the change of existent gum.Under the condition that the compositions of other hydrocarbons in 0# light diesel fuels are close,the relationship between unsaturated hydrocarbon content and existent gum changing rate is described as conic curve.The aromatic hydrocarbon content also has some influence on the existent gum changing,but the law is unobvious.