Low pressure vapor-liquid equilibria modeling of biodiesel related systems with the Cubic-Plus-Association (CPA) equation of state

The predictive ability of the CPA EoS was further evaluated in the description of multicomponent biodiesel systems with associating compounds. Using binary interaction parameters computed from fatty acid ester carbon number correlations previously established the equation was able to provide excellent predictions for the low pressure vapor-liquid equilibria of the systems soybean methylic biodiesel + methanol, soybean ethylic biodiesel + ethanol, Jatropha curcas methylic biodiesel + methanol, Jatropha curcas ethylic biodiesel + ethanol, in the pressure range 6.7-66.7 kPa.