Modified Redlich⿿Kwong equation of state for supercritical carbon dioxide

A new simple and explicit reduced temperature and reduced pressure function has been proposed in the present study for modifying Redlich⿿Kwong equation of state (EoS) to calculate the density of carbon dioxide in the supercritical region. The average absolute error of the model was found to be 1.63 and 2.07% in the comparison with the literature and NIST density data respectively, which demonstrates superiority of the model over other EoSs.