COLL 57 |
| Subhash C. Ayirala and Dandina N. Rao. Craft and Hawkins Department of Petroleum Engineering, Louisiana State University, 3516, CEBA Building, Baton Rouge, LA 70803 |
| The terms, miscibility and solubility, are widely used in phase behavior studies of ternary liquid systems. The distinction between these two terms appears to be somewhat hazy, leading to their synonymous use in some quarters. Furthermore, the relationship of these two properties with interfacial tension has largely remained unexplored. Recently, a new experimental technique of Vanishing Interfacial Tension (VIT) has been reported, relating miscibility with interfacial tension for gas/oil systems. This technique is based on the concept that, at miscibility, the value of interfacial tension between the two phases is zero. The objective of this study is to correlate miscibility and solubility with interfacial tension and to investigate the applicability of VIT technique to determine the miscibility in ternary liquid systems. A standard ternary system of benzene, ethanol and water was chosen since their phase behavior and solubility data were available. The interfacial tension of benzene in aqueous ethanol at various ethanol enrichments was measured in pendent drop mode, using the Drop Shape Analysis (DSA) technique. Experimental results indicate a strong mutual relationship between interfacial tension and solubility, in addition to demonstrating a clear distinction between solubility and miscibility. |
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Symposium in Memory of Arthur W. Adamson
2:00 PM-5:40 PM, Sunday, March 28, 2004 Marriott -- Orange County 4, Oral
Division of Colloid and Surface Chemistry |