Evaluation of the ratio of the evaporation energy to the activation energy for estimating the thermodiffusion coefficient |
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Authors: | Alireza Abbasi M. Ziad Saghir Masahiro Kawaji |
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Affiliation: | 1. Department of Mechanical Engineering, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada;2. Department of Chemical Engineering, University of Toronto, Toronto, Ontario, M5S 3E5, Canada |
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Abstract: | Thermodiffusion has an important role in displacements of hydrocarbon reservoir. The ratio of the evaporation energy to the activation energy of viscous flow in pure limits, τpure,k, is of a great importance in estimating the thermodiffusion coefficient for non‐associating fluid mixtures. Several methods may be used to estimate τpure,k which causes different values for thermodiffusion coefficients. A fixed value for τpure,k was considered to predict the thermodiffusion coefficient. In this paper, Abbasi et al.'s [J. Non‐Equilib. Thermodyn. 2010;35:1–14] model and Shukla and Firoozabadi's model have been applied to predict thermodiffusion coefficients for linear chain hydrocarbon binary mixtures. The results show a very good performance of the simple approach in respect to the previous models in estimating thermodiffusion coefficients. © 2011 Canadian Society for Chemical Engineering |
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Keywords: | thermodiffusion thermodynamics PC‐SAFT EoS free volume theory |
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