Phase equilibria of polydisperse hydrocarbons: moment free energy method analysis

TL;DR

This paper applies the moment free energy method to analyze phase equilibria in polydisperse hydrocarbons, demonstrating its accuracy and efficiency with two different equations of state, and showing it improves computational speed and generality.

Contribution

The paper introduces the application of the moment method to polydisperse hydrocarbons using two equations of state, highlighting its accuracy and computational advantages.

Findings

No qualitative difference between the two equations of state.

The moment method shows excellent agreement with previous results.

The method improves computational speed and generality.

Abstract

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. Numerical results show no particular qualitative difference between the two equations of states. Furthermore, in general the moment method proves to be an excellent 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.