Abstract: An apparatus for measurement on vapor pressures of multicomponent system was constructed using an inclined ebulliometer with a pump like stirrer according to the principle of quasi static method. It was used to determine the vapor pressures at various temperatures of a series of base oils for endothermic hydrocarbon fuel. The relationship between vapor pressures and temperatures was correlated by Antoine equation. The vaporization enthalpies of these base oils were then calculated from Clausius Clapeyron equation. These results provide basis information for the study and performance of endothermic hydrocarbon fuel.

Key words: Endothermic fuel;Hydrocarbon fuel;Vapor pressure;Vaporization enthalpy;Inclined ebulliometer;Quasi static method

摘要： 根据拟静态法原理 ,采用斜式沸点计建立了一套适用于多组分体系饱和蒸气压测定的装置。测定了用于制备吸热型碳氢燃料的一组基础油品在一系列温度下的饱和蒸气压 ,用Antoine方程关联了饱和蒸气压与温度的关系 ,同时根据Clausius Clapeyron方程计算了各基础油品的蒸发焓和蒸发熵。为吸热型碳氢燃料的调配和性能评价提供了基础信息

关键词: 吸热燃料;烃类燃料;蒸气压;蒸发热;斜式沸点计;拟静态法