03 مهر 1400

شهریار عصفوری

مرتبه علمی: دانشیار
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 88019360
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان Wilson Non-random Factor Reference State Based Model for Prediction of Gas Hydrate Formation Conditions in the Presence of Electrolyte and/or Alcohol in Solution
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
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مجله JOURNAL OF SOLUTION CHEMISTRY
شناسه DOI
پژوهشگران شهریار عصفوری (نفر اول) ، رضا آذین (نفر دوم) ، رضا غلامی (نفر سوم) ، محمود مشفقیان (نفر چهارم)

چکیده

In this study, a new thermodynamic model is presented for prediction of hydrate formation conditions of different hydrate formers in solutions containing an electrolyte, alcohol and their mixtures. The developed model is based on the c–u approach for modeling the phase behavior. The theory of van der Waals–Platteeuw and the Valderama–Patel–Teja equation of state coupled with non-density dependent mixing rules were used to describe the hydrate and vapor phase, respectively. Also, the nonelectrolyte Wilson, non-random factor local composition model and Margules equation were adopted to determine the water activity in solutions containing electrolyte and alcohol, respectively. The effects of solubility of the components in the liquid and vapor phases were considered for prediction of hydrate formation conditions. The model was applied to a number of hydrate forming compounds and mixtures in different electrolyte and methanol solutions, including NaCl, KCl and CaCl2 and their mixtures, and results are compared with experimental data and/or existing models. It was found that hydrate formation conditions are better predicted by this model compared to existing models, especially for ethane and propane in electrolyte solutions, and C1/CO2/C3 gas mixture in solutions containing electrolyte and alcohol. The solubility of components in the liquid and vapor phases was found to have a considerable effect on the model predictions.