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Laminar liquid jet diffusion studies

✍ Scribed by J. L. Duda; J. S. Vrentas

Publisher
American Institute of Chemical Engineers
Year
1968
Tongue
English
Weight
895 KB
Volume
14
Category
Article
ISSN
0001-1541

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✦ Synopsis

The Dow Chemical Company

,

M i d l a n d ,

M i c h i g

a n A rigorous analysis of jet hydrodynamics is used to develop a technique for determining diffusion coefficients from laminar liquid jet absorption experiments, and the influence of the jet fluid mechanics on the absorption process is clarified. The new technique is used to determine the diffusivities of carbon dioxide, oxygen, argon, nitrous oxide, ethylene, and propylene in water within the temperature range 25" to 40Β°C.

A critical analysis of available diffusivity data for these gases indicates that there is no conclusive evidence that demonstrates the existence of a significa:it interfacial resistance in uncontaminated laminar jet experiments. In addition, comparison of existing data shows that the commonly accepted diffusivities for the oxygen-water system may be significantly higher than the actual values. I t is concluded that the laminar jet experiment is a rapid, accurate method of obtaining diffusion coefficients of dissolved gases in liquids.

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