A new approach for prediction of gas hydrate formation conditions in aqueous electrolyte solutions

A thermodynamic model for the calculation of hydrate formation temperatures of different hydrate formers in mixed electrolyte solutions is presented. The model uses the existing theory for the calculation of the water fugacit y in single salt solutions and has been extended to mixtures of common elec trolytes, i.e., NaCl, KCl and CaCl2. The present model, in contrast to prev ious models, needs no flash calculation procedure. The average absolute dev iation of the model, using available experimental data, was about 0.4 K. (C ) 2000 Elsevier Science B.V. All rights reserved.