Document Type
Thesis
Date of Award
6-30-1959
Degree Name
Master of Science in Chemical Engineering - (M.S.)
Department
Chemical Engineering
First Advisor
George C. Keeffe
Abstract
The study of monovalent and bivalent ion diffusion coefficients was undertaken to determine the practicability of using the Reichen berg equation to calculate a film thickness from a single diffusion coefficient and through the use of this film thickness to predict the diffusion coefficient of any monovalent or bivalent ion.
Experimentation employed the use of a mixing vessel with a two bladed propellor into which a solution of known ion concentration was kept at a constant temperature and mixing speed. Dowex 50 x -8 hydrogen ion type resin was added to the solution and by means of a pH meter the time versus pH data-recorded.
The work was carried out under two separate investigations, one by each of the authors. The investigation of one author was conducted at a mixing speed of 400 RPM" using a resin size of -40 + 50 while the second investigator used a mixing speed of 800 RPM and resin size of -50 + 65.
Results of the study indicate that values of diffusion coefficients are predictable over the range of concentration for which film diffusion is the rate control factor. The values are predictable on the basis of having one known value of diffusion coefficient of any ion. By determing a film thickness for that ion under a given set of conditions, the diffusion coefficients for other ions may be predicted from ion exchange data.
Recommended Citation
Kahn, Michael Maxwell, "Diffusion coefficient from hydrogen ion exchange studies" (1959). Theses. 3279.
https://digitalcommons.njit.edu/theses/3279
