碳氢燃料的蒸气压与气-液平衡测定

采用拟静态沸点计法测定两种碳氢燃料在11种不同配比下的泡点蒸气压和平衡温度,用Antoine方程关联了蒸气压与温度的关系,精度良好,同时计算了气化焓和气化熵．在假设两种燃料组成“假二元”体系的基础上,进行了气-液平衡计算,给出了T-x,y和P-x,y相图．为吸热型碳氢燃料的研制和有关模拟计算、过程优化提供重要依据．

Measurements of vapor pressure and vapor-liquid equilibria of hydrocarbon fuels

Data of bubble- point vapor pressure and equilibrium temperature for 11 samples with different compositions originated from two kinds of hydrocarbon fuels were measured by using an inclined ebulliometer with a pump- like stirrer on the basis of the principle of quasi- static method. Correlation between vapor pressures and equilibrium temperatures by the Antoine equation was given with satisfactory precision, from which the vaporization enthalpy and vaporization entropy values were estimated. On the supposition that each fuel fraction is a pseudo- component and the corresponding mixtures are pseudo- binary systems, the vapor- liquid equilibrium data and the phase diagrams of T- x, y and p- x, y were obtained. These results provided important information for the development, simulated calculation and process optimization of endothermic hydrocarbon fuels.