Stability calculations of semicontinuous mixtures based on equations of state

被引：8

作者：

Browarzik, D ^{[1
]}

Kowalewski, M ^{[1
]}

Kehlen, H ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Inst Chem Phys, D-06217 Merseburg, Germany

来源：

FLUID PHASE EQUILIBRIA | 1998年 / 142卷 / 1-2期

关键词：

equation of state; spinodal; critical point; methods of calculation; continuous thermodynamics; semicontinuous mixtures;

D O I：

10.1016/S0378-3812(97)00190-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The stability of a semicontinuous mixture of the type continuous ensemble + discrete component is treated by continuous thermodynamics based on an equation of state. Its parameters are assumed to depend on the molar distribution function of the continuous ensemble by only the number average of the identification variable (molar mass, C-number, etc.) of the species. Equations to calculate the spinodal and the critical point are derived. For demonstration, the method is applied to a semicontinuous n-alkane mixture with methane as discrete component. Using the Soave-Redlich-Kwong equation of state spinodal and critical point are calculated describing the polydispersity by a Gamma distribution. (C) 1998 Elsevier Science B.V.

引用

页码：149 / 162

页数：14

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