Doctoral Dissertations

Abstract

"The Eyring rate theory equation has been modified successfully to enable predictions of binary molecular diffusivities for a wide variety of liquid-liquid systems. The activation free energy for binary diffusion has been evaluated in terms of the activation free energies for self diffusion of the solvent and solute. This was accomplished through the use of regular solution theory by relating the bond breaking energy of the jump step to the bond breaking energy in evaporation. Diffusivities estimated by this equation and the equations developed by Olander, by Gainer and Metzner, and by Wilke and Chang were compared with experimental data. All of the equations tested predicted adequately the diffusivities for most low viscosity as well as for some moderately high viscosity systems. The high viscosity system diffusivities are more accurately predicted by three modified absolute rate theory equations. An important result of this study was the observation that the jump step portion of the total activation energies generally constituted from 0 to 35 percent of the total energy for all of the modified absolute rate theory equations"--Abstract, page i.

Advisor(s)

Wellek, Robert M.

Committee Member(s)

Edwards, D. R.
Webb, William H.
Bertrand, Gary F.
Johnson, James W., 1930-2002
Strunk, Mailand R., 1919-2008

Department(s)

Chemical and Biochemical Engineering

Degree Name

Ph. D. in Chemical Engineering

Sponsor(s)

United States. National Aeronautics and Space Administration
University of Missouri--Rolla. Department of Chemistry

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

ix, 167 pages

Note about bibliography

Includes bibliographical references (pages 163-166).

Rights

© 1970 Ronald Dean Mitchell, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Diffusion
Mass transfer
Fluids
Molecules

Thesis Number

T 2375

Print OCLC #

6020180

Electronic OCLC #

855626365

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