New Procedures for Application of the Wong-Sandler Mixing Rules to the Prediction of Vapor-Liquid Equilibria
| Autor: | Nishawn S. M. Hanif, Guor-Shiarn Shyu, Philip T. Eubank |
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| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | Industrial & Engineering Chemistry Research. 34:314-323 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | New procedures are developed for use with the recent Wong-Sandler mixing rules for the prediction of mixture phase equilibria from cubic equations of state. Improvements in the apriori evaluation of both the liquid-phase parameter A[sub [infinity]][sup E] and the gas-phase parameter B[sub 12][sup EOS] (or k[sub 12]) are made. An important new procedure is developed where the latter parameter is found from experimental measurements of the cross second virial coefficient B[sub 12][sup Exp] in the single-phase vapor mixture at low pressures. Apriori prediction of phase equilibria to high pressures and temperatures then follows when the liquid-phase parameter A[sub [infinity]][sup E] is estimated from a group- contribution method, such as UNIFAC. An order-of-magnitude analysis shows the resultant phase equilibria to be more sensitive to the gas-phase parameter B[sub 12][sup EOS]. These new procedures are most promising in the prediction (not correlation) of the phase behavior of complex systems, such as CO[sub 2]/H[sub 2]O/oil in petroleum reservoirs undergoing CO[sub 2] and/or steam flooding. |
| Databáze: | OpenAIRE |
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