New equation of state is accurate for VLE, PVT calculations of oil mixtures

A new cubic molecular-based equation of state (MMM) accurately calculates pressure, volume, temperature (PVT) and vapor-liquid equilibrium (VLE) data for pure and mixed fluids.Comparisons to the Redlich-Kwong (RK) equation of state, which is considered the best two-constant-parameter equation of state, indicated that the MMM equation of state was more accurate.This article reports application of the MMM equation of state to pure and mixed fluid calculations of interest to the oil and gas industries. Comparison of the results to those obtained using the RK and Peng-Robinson (PR) equations of state showed that MMM is more accurate.Equations of stateVolumetric and equilibrium calculations fo...

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