Equation of State for Water-Alcohol Mixtures over a Wide Range of State Variables

被引：3

作者：

Karabekova, B. K. ^{[1
]}

Bazaev, E. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Geothermal Problems, Dagestan Sci Ctr, Makhachkala 367030, Dagestan, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2015年 / 89卷 / 09期

关键词：

temperature; pressure; density; concentration; phase; fluid; equation of state; compressibility factor; reduced parameters; METHANOL PLUS WATER; LIQUID;

D O I：

10.1134/S0036024415090150

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Coefficients of the three-parameter polynomial equation of states are determined from experimental data on the (p, rho, T, x) relationship for water-aliphatic alcohol (methanol, ethanol, and n-propanol) mixtures in the liquid and vapor phases and in the supercritical state: expansions of compressibility factor Z = p/RT rho (m) into series in powers of reduced density omega = rho(m)/rho(mcr); reduced temperature tau = T/T (cr) and composition x (as the mole fraction of alcohol), Z = p/RT rho(m) = 1 + Sigma(m)(i=1)Sigma(m)(j=0)Sigma(s)(k=0) a(ijk)omega(i)tau(-j)x(k); Z = p/RT rho(m) [1 + Sigma(m)(i=1)Sigma(m)(j=0)Sigma(s)(k=0) a(ijk)omega(i)tau(-j)x(k). The mean percentage errors of the calculated pressure values relative to the experimental values are 2% (liquid phase), 0.7% (vapor phase), and 0.5% (supercritical fluid).

引用

页码：1545 / 1555

页数：11