Abstract: On the basis of the Soave and Martin-Hou equations, a new cubic equation of state is suggested. Expressions for calculating its constants and the corresponding formulas for its thermodynamic functions were derived. Good agreement was obtained between literature values and results calculated from phase equilibrium constants and dew points for ten binary pairs.

摘要： 在Soave和Martin-Hou方程的基础上,提出一个新的三常数状态方程.文中给出了方程中各系数的计算式及其热力学函数的有关公式.经过相平衡常数的计算表明,本方程可用于含氢的低温系统中,其平衡常数的误差均小于8%.各二元对露点的误差均小于1K.