Studies on Parameters for Corresponding States

严新建; 许志宏

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Studies on Parameters for Corresponding States

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- Studies on Parameters for Corresponding States
- CIESC Journal Issue 4, (1988)
- 作者机构：
  
  中国科学院化工冶金所,中国科学院化工冶金所 ,北京,北京
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 August 1988，
  
  Published：25 August 1988
- 稿件说明：
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严新建, 许志宏. Studies on Parameters for Corresponding States[J]. CIESC Journal, 1988, (4).
DOI：

严新建, 许志宏. Studies on Parameters for Corresponding States[J]. CIESC Journal, 1988, (4). DOI：

摘要

本文提出对于以偏心因子(?)为对应态第三参数的物性关联式而言

临界压缩因子Z_c是一个好的校正因子

用Z_c成功地校正了Patel-Teja状态方程中两个有关分子特性的关联式

并将仅能计算非极性分子饱和液体体积的Bhirud方程扩展到了极性分子.

Abstract

This paper proposes that a critical compressibility factor Zc can be used as a fourth parameter for corresponding states

as a result of the analysis of the relationship between Zc and acentric factor w. Two formulas used in the Patel-Teja equation of state for expressing molecular characteristics can be improved by using Zc. Excellent results are obtained with these two new formulas for predicting certain polar molecules not included in the process of fitting parameters. Bhirud equation

which is only adoptable for saturated liquid volumes of non-polar molecules

has been successfully extended for polar molecules. For polar molecules

no definite relationship does exist between Zc and w. It is assumed

therefore

that Zc would probably serve as a good correction factor for some formulas in which w is used as the third parameter for corresponding states.

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