Thermodynamic equilibrium of adsorbed phases |
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| Institution: | 1. Bureau of Economic Geology, The University of Texas at Austin, United States;2. C&C Reservoirs Inc., Houston, TX, United States;3. ExxonMobil Upstream Research Company, Houston, TX, United States;1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of Renewable Energy, North China Electric Power University, Beijing, 102206, China;2. Sinopec Engineering Incorporation, Process Department, Beijing, 100101, China;3. Program of Materials Science and Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, CA 92093, USA;1. Department of Petroleum Engineering, Colorado School of Mines, Golden, CO 80401, United States;2. Schlumberger-Doll Research, Cambridge, MA 02139, United States |
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| Abstract: | The types of phase equilibrium behavior for adsorbed binary mixtures that can be predicted by an equation of state (EOS) based on the lattice gas theory are investigated. The equilibrium conditions were obtained by solving the isofugacity equations between adsorbed phases. It is observed that the investigated EOS can predict complex behavior for adsorbed phases such as the existence of azeotropes, and retrograde and double retrograde phase transition phenomena, that are analogous to those found in bulk phase equilibrium. Furthermore, it was possible to find systems that presented phase equilibrium between two dense adsorbed phases, analogously to liquid–liquid equilibrium for bulk phases. Experimental data would be necessary to confirm the types of adsorbed phase behavior predicted by the calculations presented. |
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