【摘要】 本文是模拟Carnahan—Starling硬球方程的斥力贡献,选用Soave的经验的吸力贡献,相结合而成的一个新的二参数立方型方程。参数a和b被回归为临界参数(Tc,Pc)和偏心因子(ω)的函数。方程已被成功地用来计算非极性组份的蒸汽压、饱和液体的体积和混合物的汽液平衡。其饱和液体体积的计算偏差明显地小于目前应用很广的Soave和Peng—Robinson方程。更多还原

【Abstract】 The new perturbed hard spheric state equation, which combined Carnahan-Starling’s repulsive contribution with Soave’s empiric attractive contribution, is a simplified cubic equation with two parameters. By regression, parameters a and b become the functions of critical parameters (T_c, P_c)and eccentric factor(w). This equation has been successfully used in estimation of the vapor pressure of non-polar components, the volume of saturated liquid and the vapor-liquid equilibrium of mixture. The deviation of the estimated volume of saturated liquid is apparently smaller than that obtained by the Soave and Peng-Robinson equation which is widely used at present.更多还原