Modeling on the Phase Equilibrium of Gas Hydrate in Electrolytes Containing System

•Electrolyte NRTL equation coupled with Chen and Guo hydrate model was built.•Contributions of long-range and short-range interactions in saline solution were considered.•AAD for single and mixed electrolytes is superior to the van der Waals type models.•A higher prediction precision for high-concentration saline solutions was obtained.