We analyze the phase equilibria of systems of polydisperse hydrocarbons by means of the recently introduced moment method. Hydrocarbons are modelled with the Soave-Redlick-Kwong and Peng-Robinson equations of states. Numer- ical results show no particular qualitative difference between the two equations of states. Furthermore, in general the moment method proves to be an ex- cellent method for solving phase equilibria of polydisperse systems, showing excellent agreement with previous results and allowing a great improvement in generality of the numerical scheme and speed of computation.
PHASE EQUILIBRIA OF POLYDISPERSE HYDROCARBONS: MOMENT FREE ENERGY METHOD ANALYSIS / A .Speranza; F. Di Patti; A. Terenzi. - STAMPA. - 75:(2007), pp. 561-572. (Intervento presentato al convegno 8th Conference of the Italian-Society-for-Applied-and-Industrial-Mathematics tenutosi a Baia Samuela, ITALY nel MAY 22-26, 2006).