煤液化加氢改质油窄馏分密度和黏度与温度的关系

Relationship between density and viscosity of narrow distillated fractions upgraded from direct coal liquefaction and temperature

为研究煤直接液化加氢改质油的基本物化性质,将神华煤直接液化加氢改质油经实沸点蒸馏切割得到15个窄馏分,测定每个窄馏分在不同温度下的密度和黏度,考察各窄馏分密度、黏度随切割温度的变化规律。结果表明,神华煤液化加氢改质油150~250℃喷气燃料馏分占总量的59.96%,具有制备高密度喷气燃料的潜质。窄馏分密度随温度的升高而降低,呈很好的线性关系,且各窄馏分的密度受温度影响程度基本相同。理论推导出窄馏分体积膨胀系数与线性系数也呈线性关系,且体积膨胀系数随沸点的升高而降低;实测不同温度下窄馏分的运动黏度,计算得出对应馏分的动力黏度,动力黏度随温度的升高而降低,且符合Vogel关系式。

In order to investigate the basic physical and chemical properties of direct coal liquefaction hydro-upgraded oil,the oil was cutinto 15 narrow fractions with the true boiling point distillation unit. The specific density and kinematic viscosity of the narrow fractions weredetermined at different temperatures,and the relationship between these properties and temperature was correlated. The results showed thatthe 150 ~ 250 ℃ jet fuel fraction of Shenhua direct coal liquefaction oil accounted for 59. 96%. It could be made into high density jet fu-el. The specific density decreased linearly with the increase of temperature. Volume expansion coefficients of the fractions also decreasedlinearly with the increase of the linear coefficient. The dynamic viscosity decreased with temperature rising agreed with Vogel＇s equation.