Use of differential scanning calorimetry to study phase behavior of hydrocarbon mixtures in nano-scale porous media

The bubble point is modeled using Peng-Robinson equation of state (PR EOS) with the capillary pressure considered. The flash calculation is performed based on isofugacity and an interfacial tension model is accommodated. The modeling gives an exaggerated bubble point temperature shift and does not match the experimental results. This suggests the poor accuracy of the PR EOS/capillary pressure model in describing the behavior of nanoconfined fluid mixtures.