Effect of Gas Sparging on Mass Transfer in Zinc Electrolytes

Abstract

The effect of sparging on mass transfer is reported for zinc electrolytes containing antimony and antimony-free electrolytes. Comparative results with non-sparged electrolytes show, an enhancement in mass transfer. In the sparged electrolyte, the mass transfer coefficients, K Zn, increase with increasing current density, antimony additions, and sulphuric acid concentration. The deposition morphology is consistent with the mass transfer results. A relationship between the mass transfer coefficients for sparged and non-sparged systems is obtained. The relationship correlates satisfactorily with the data and provides a quantitative method for determining the degree of enhancement in mass transfer coefficients due to sparging. The correlation which best represents the mass transfer data for sparged zinc electrolytes is Mathematical expression where Sh, Re, and Sc are the Sherwood, Reynolds, and Schmidt numbers, respectively. The correlation represents the case where sparging is applied to a gas evolving electrode, hydrogen in this case. © 1992 Chapman & Hall.

Department(s)

Materials Science and Engineering

Second Department

Chemical and Biochemical Engineering

Third Department

Chemistry

International Standard Serial Number (ISSN)

0021-891X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1992 Springer Verlag, All rights reserved.

Publication Date

01 Jan 1992

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