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

doi:10.1016/S1004-9541(13)60548-0

摘要/Abstract

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 C₉ to C₂₀ 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.

关键词: heavy n-alkanes, density, Tao-Mason equation of state, Ihm-Song-Mason equation of state

Abstract: 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 C₉ to C₂₀ 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.

Key words: heavy n-alkanes, density, Tao-Mason equation of state, Ihm-Song-Mason equation of state

Fakhri Yousefi, Hajir Karimi, Mohammad Mehdi Papari. Extension of Tao-Mason Equation of State to Heavy n-Alkanes[J]. Chinese Journal of Chemical Engineering, 2013, 21(8): 894-900.

Fakhri Yousefi, Hajir Karimi, Mohammad Mehdi Papari. Extension of Tao-Mason Equation of State to Heavy n-Alkanes[J]. Chin.J.Chem.Eng., 2013, 21(8): 894-900.

参考文献

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