Effect of Kihara Potential Parameters on Prediction of Propane Hydrate Dissociation Conditions
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Shiraz University of Technology, Shiraz, Iran
Abstract
Prediction of hydrate dissociation conditions of natural gases has a great importance for various applications such as flow insurance, gas separation and storage. In this communication, using the solid solution theory of van der Waals and Platteeuw, propane hydrate dissociation conditions have been predicted based on the available different sets of propane Kihara parameters reported in the literature. Based on the results, some set predict Structure I (SI) more stable for full or partial ranges of experimental pressures, a wrong prediction. The Kihara potential parameters, reported by Parrish and Prausnitz [20], with the average absolute deviation of 0.12 K, has the best accuracy, however, for some dissociation conditions the SI are predicted as the more stable structure based on this set. So, in using the reported Kihara parameter for prediction of hydrate dissociation point of propane and specially natural gases containing propane one should be careful of predicting of wrong structure as stable structure.
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