Department Personnel
Professor Ronald Danner | Research
Thermodynamic studies
Phase equilibria are being measured as described above, frequently in response to specific problems cited by our industrial sponsors. These data, together with data collected from the literature, are being used to develop models to correlate and ultimately predict phase behavior. Equations of state are the primary tool used in these efforts. We have developed equations that require only the specification of the chemical makeup of the molecules-group-contribution methods.
Diffusion studies
We also obtain diffusivity data from the inverse gas chromatography method. In the past this method has been primarily used to measure systems with only an infinitely small amount of a single solvent. We are extending the method to higher concentrations of solvent and to multicomponent cases. Currently there are virtually no multicomponent data available in the literature. Additional data are also being obtained from the absorption uptake method, a time-proven technique. These data are used to develop and improve models for the correlation and prediction of diffusion coefficients. The dominant method in this area has been the free-volume theory as developed by J. L. Duda and J. S. Vrentas. We are striving to develop a completely predictive approach based on the free-volume model.
Industrial orientation
In our research program we have always tried to put a strong emphasis on application. In addition to the typical research journal publications, a lot of our work appears in handbooks and computer software packages used by practicing engineers. In these efforts we have always maintained a close association with industrial research and design groups. This industrial involvement has continually provided motivation and reinforcement for our research programs. We study and learn a lot about molecular theory and statistical mechanics, and we strive to use the insights obtained therefrom to develop methods that will solve real-world problems.