抄録
In a previous paper, we extended the Tao and Mason equation of state (TM EOS) to refrigerant fluids using speed of sound data. Herein, we employ the TM EOS to predict volumetric properties of multi-component mixtures of liquefied natural gas (LNG). The second virial coefficient, B2(T), necessary for the mixture version of the TM EOS, in the absence of sufficient experimental data on B2(T), were calculated from the corresponding state correlation. Analysis of our predicted results shows that the TM EOS is capable of accurately predicting the densities of multi-component liquefied natural gas mixtures over wide range of temperatures and pressures. The overall average absolute deviation (AAD) of the calculated densities from the literature ones for 222 data points was found to be 2.37%. Furthermore, the densities of LNG mixtures obtained from the TM EOS have been compared with those calculated from Peng–Robinson (PR) and Ihm–Song–Mason (ISM) equations of state. Generally, our results show that the TM EOS is favorable over the two other equations of state. The overall average absolute deviation for the 222 data points calculated by ISM and PR equations of state were of the order of 2.90% and 4.85%, respectively.
