A Qualitative Study on Compressibility Factor Using M-Factor Theory

In this study for the first time a new description of compressibility factor based on the virial expansion has been presented. The compressibility factor as a function of M-factor was qualitatively expressed. At first, we present how may the third, fourth and higher order virial coefficients be logically ignored in order to simplify the virial equation. The experimental data were found and then compressibility factor curves were provided. The results show, when compressibility factor has been presented as a function of M-factor instead of pressure, an mproved regression operation on experimental data is possible. Moreover, the results show the compressibility factor will not depend on kind of substance, if it is considered as a function of M-factor. Also we found that the compressibility factor can easily be estimated by a second order polynomial respect to M-factor. The simplifying effects of M-factor to present the compressibility factor of binary mixtures were investigated. It was found that classical mixing rules are vain in compressibility factor predicting at special conditions. Finally, the present work strongly recommends to researchers to modify their equations according to M-factor theory.

کلیدواژه ها:

Compressibility factor ، EOS ، Isotherm ، M-factor ، Virial coefficients