Parameterization and uncertainty analysis of binary interaction parameters for triethylene glycol and ethane/propane

Formation of gas hydrates in natural saturated with water threatens the integrity subsea pipelines, therefore effort must be put into inhibiting these processes. A commonly used inhibition method is dehydration triethylene glycol (TEG), which molecule interest this work. In our previous study, new multicomponent vapour-liquid-equilibria (VLE) data for TEG/water/natural systems were published, along Cubic-Plus-Association (CPA) equation state (EoS) thermodynamic modelling. Some binary interaction parameters (BIP) work, however, only available literature 4C association scheme TEG. context, BIPs TEG-Ethane and TEG-Propane using different schemes (4F, 5F, 6F 5C) TEG optimised The older parameter values also improved. confidence intervals fitted derived from statistical bootstrapping uncertainty analysis. Results revealed a low degree (±0.70%) parameter, while linear correlation between two terms BIP generated higher uncertainties (±61%). newly were, then, to model same VLE previously mentioned. Minor improvements classical further confirmed as best choice CPA framework.