立方形状态方程的相图分析  

ANALYSIS ON THE PHASE DIAGRAM OF THE CUBIC EOS

作　　者：张燕若 卢焕章[1] 

机构地区：[1]北京化工学院

出　　处：《化学工程》1989年第3期12-20,共9页Chemical Engineering(China)

摘　　要：本文通过对修正Ω的R-K方程的数学分析,对根的取舍和判断作了明确的解释。通过对纯二氧化碳、二氧化碳-异丁烷以及二氧化碳-正癸烷体系的P-V相图分析,可以了解各相图区中的VL,Vv以及汽液两相共存区的准确位置和数值,及其可能导致的误差。A satisfactory explanation for the roots accepted or discarded of the modified Ω's R-K EOS by making mathematical analysis on the equation is given. Analyzing the P-V Phase diagram of pure carbon dioxide, carbon dioxide-isobutane and carbon dioxide-n-decane systems, one is able to know the correct position and value of V^L and V^V, and the region of coexisting vapor and liquid phases in each phase diagram. Error that may be ocurred is also known.

关 键 词：状态方程 相图 立方形 

分 类 号：O642.42[理学—物理化学]