Prediction of VLE and VLLE of systems containing hydrocarbon reservoir fluids and aqueous methanol solutions with a cubic EOS

With the purpose of accurately representing the phase equilibria of hydrocarbon reservoir fluids, water, and methanol, the revised modified Patel-Teja model (MPT2 model) has been extended to predict the vapour-liquid (VL) and vapour-liquid-liquid (VLL) equilibria of hydrocarbon/water/methanol systems. The prominent feature of the work presented in this paper is the minimum usage of binary interaction parameters (BIPs) in the prediction of VLE and VLLE data. The accuracy and reliability of the extended MPT2 model has been demonstrated by extensively testing against diverse experimental data on VLE and VLLE of ternary, quaternary, five component, natural gas, and reservoir oil systems containing water and methanol. The extended MPT2 model can be easily applied to production schemes of natural gases from hydrate formations, hydrocarbon flowlines, and processing units.