Translational-rotational coupling parameters for mutual diffusion in normal alkane solvents at high temperatures and pressures /
| Main Author: | |
|---|---|
| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1989.
|
| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | The infinite dilution diffusion coefficients of n-alkane solutes ranging from methane to n-tetradecane have been measured in n-octane and in n-hexadecane in the temperature range 300-541 K. Using the framework of the rough hard sphere theory, the values of the translational rotational coupling parameter for each solute solvent pair have been extracted from experimental data at each temperature. The coupling parameter was found to be independent of temperature and it decreases with the increasing carbon number of the solvent molecule. Furthermore, the spherical shape of the solute molecule tends to increase the amount of coupling between the solute and the solvent molecules. The density dependency of the coupling parameter has also been investigated using the high pressure diffusivity data in the literature. The parameter was found to be independent of density. The concentration dependency of the coupling parameter has also been investigated using the available data in the literature. For equimolar mixtures of n-alkanes, the parameter was found to be independent of temperature. Based on the values of the coupling parameter, a calculation scheme has been developed for accurate determination of infinite dilution diffusion coefficients of a wide variety of solutes in n-alkane solvents at a wide range of thermodynamic states. |
|---|---|
| Item Description: | Typescript (photocopy). Vita. "Major subject: Chemical Engineering." |
| Physical Description: | viii, 73 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |