Extension of Tao-Mason Equation of State to Heavy n-Alkanes

作     者：Fakhri Yousefi Hajir Karimi Mohammad Mehdi Papari 

作者机构：Department of Chemistry Yasouj University Department of Chemical Engineering Yasouj University Department of Chemistry Shiraz University of Technology 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2013年第21卷第8期

页      面：894-900页

核心收录：

学科分类：080701[工学-工程热物理] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 

基　　金：H. Karimi and F. Yousefi would like to thank Yasouj University for supporting this project 

主　　题：heavy n-alkanes density Tao-Mason equation of state Ihm-Song-Mason equation of state 

摘      要：In our previous paper we extended the Tao and Mason equation of state (TM EOS) to refrigerant fluids, using the speed of sound data. This is a continuation for evaluating TM EOS in predicting PVT properties of heavy n-alkanes. Liquid density of long-chain n-alkane systems from C 9 to C 20 have been calculated using an analytical equation of state based on the statistical-mechanical perturbation theory. The second virial coefficients of these n-alkanes are scarce and there is no accurate potential energy function for their theoretical calculation. In this work the second virial coefficients are calculated using a corresponding state correlation based on surface tension and liquid density at the freezing point. The deviation of calculated densities of these alkanes is within 0.5% from experimental data. The densities of n-alkanes obtained from the TM EOS are compared with those calculated from Ihm-Song-Mason equation of state and the corresponding-states liquid densities (COSTALD). Our results are in favor of the preference of the TM EOS over other two equations of state.