二元低压汽液平衡p、y、χ关系及其在加压中的近似应用

APPROXIMATE p,y,x RELATIONSHIP FOR ISOTHERMAL MODERATE PRESSURE BINARY VLE

把汽液平衡的真实状态看成是3个虚拟状态的组合,结合Gibbs-Dubem方程,推得了等温低压汽液平衡时p-y-x之间的一个近似关系式,并把它推广应用到加压及含超临界组分体系的汽液平衡计算.

The real state of vapor liquid equilibria is considered as a combination of three fictitious states. From the relation between the real state and three fictitious states, the approximatep, y, x relationship can be obtained from these fictitious states with the help of the Gibbs-Duhem equation. This method was used to calculate isothermal high (low) pressure vapor liquid equilibria with satisfactory results, while no equations of state or equations of activity coefficients were needed.