Equation of state modeling for the vapor pressure of biodiesel fuels

The vapor pressure and liquid heat capacity of seven biodiesel fuels and its components (fatty acid methyl esters – FAMEs) were modeled using the advance Peng–Robinson equation of state. The dataset used for the modeling was obtained from the literature and included FAME properties and the composition, vapor pressure, and liquid heat capacity of the biodiesel fuels from different sources at temperatures from 50 to 130 °C and −30 to 75 °C, respectively. New values for the critical properties and acentric factor of FAMEs are introduced as well as new models for the ideal gas heat capacity for the FAMEs. The average AARD is 12% for vapor pressure and 3% for liquid heat capacity.