Abstract
Vapor-Liquid equilibrium (VLE) data involving alcohols and hydrocarbons are relevant to the gas and oil industry. Under certain circumstances, for instance, in the determination of the distribution of components between phases in equilibrium, and physical properties of the fluids in reservoirs, the predictions from the available models for hydrocarbon systems in the presence of flow-assurance additives, such as alcohols, are, at times, insufficient. This study used the Conductor-like Screening Model-Segment Activity Coefficient (COSMO-SAC) to predict liquid phase activity coefficients for the description of VLE of seven binary systems containing alcohols and hydrocarbons, at low and high pressures (10-2500kPa), and under temperatures ranging from 298-400K. The COSMO SAC has a relatively simple mathematical form and can be easily incorporated into a process simulation software. COSMO-SAC model predictions in this work showed average absolute relative deviation (AARD) values ranging from 5.0% to 13.8%.
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