Gas hydrate equilibria in the presence of monoethylene glycol, sodium chloride and sodium bromide at pressures up to 150 MPa

The Soave-Redlich and Kwong - Cubic-Plus-Association equation of state combined with a modified Debye Hückel electrostatic term is employed to model the phase equilibria. The hydrate-forming conditions are modelled by the solid solution theory of van der Waals and Platteeuw. The thermodynamic model has been evaluated using these new generated hydrate data. The thermodynamic model (as implemented in our in-house software HWPVT 1.1) and experimental data are in good agreement, supporting the reliability of the developed model.