Limiting Activity Coefficients for Aqueous Solutions
Trampe, Diane Bergmann
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/72144
Description
Title
Limiting Activity Coefficients for Aqueous Solutions
Author(s)
Trampe, Diane Bergmann
Issue Date
1993
Doctoral Committee Chair(s)
Eckert, Charles A.
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
Environmental Sciences
Abstract
Measurement techniques for limiting activity coefficients ($\gamma\sp\infty$) are reviewed with respect to aqueous solutions. Literature values for $\gamma\sp\infty$ of solutes in water at 25$\sp\circ$C were compiled and critically evaluated to form a database of high confidence for 120 compounds. Predictive expressions for $\gamma\sp\infty$ were analyzed for aqueous systems. The use of other thermodynamic measurements such as inverse solubility and hexadecane-water and octanol-water partition coefficients were also evaluated as methods for obtaining $\gamma\sp\infty$ of solutes in water. A database of inverse solubility of solutes in water was compiled. Differential ebulliometry was used to measure $\gamma\sp\infty$ over a modest range of temperatures for three solvents in water and water in six solvents. The data were used to demonstrate the limitations of several current excess Gibbs energy expressions in representing both vapor-liquid and liquid-liquid equilibrium data from $\gamma\sp\infty$ measurements. A new technique for measuring limiting activity coefficients of low relative volatility solutes was developed based on measuring the change in the dew point temperature of a solvent with the dilute addition of a solute. This dew point method was used to measure $\gamma\sp\infty$ for three solutes in water over a range of temperatures. The low $\gamma\sp\infty$ values for these solutes indicate solvation occurring in the mixture. Ideal chemical theory was used to model the measured dew point temperatures.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.