Measurement and Prediction of Limiting Activity Coefficients
Chen, Wen-Teh
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https://hdl.handle.net/2142/69770
Description
Title
Measurement and Prediction of Limiting Activity Coefficients
Author(s)
Chen, Wen-Teh
Issue Date
1986
Department of Study
Chemical Engineering
Discipline
Chemical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Chemical
Abstract
Activity coefficients at infinite dilution ((gamma)('(INFIN))'s) were determined for several classes of solutes in the polar solvents 1-octanol, acetophenone, and furfural at 20, 40, and 60(DEGREES)C by a gas chromatographic technique. An improved form of the Modified Separation of Cohesive Energy Density model was developed to predict (gamma)('(INFIN))'s using pure component and temperature independent parameters. For about 3000 protic and aprotic, but nonaqueous and nonionic (gamma)('(INFIN))'s over wide temperature ranges, an average deviation of 11% was achieved with few unsatisfactory predictions. Overall, the temperature dependence of the (gamma)('(INFIN))'s was characterized adequately by the use of universal temperature coefficients and a group energy parameter. The model, with its strengths of simplicity in formulation and application, and physically intuitive parameters, represents an excellent engineering tool to predict the solution behavior at infinite dilution.
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