Selectivity in gas purification: film theory, semi-infinite medium
✍ Scribed by R.C. Aiken
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 571 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
AbstractA film theory model describing simultaneous transport of two gases into a reactive liquid has been used in an examination of the conditions that optimize selectivity. One component reacts instantaneously, the other at a finite rate. The resulting unstable two point boundary value problem was solved numerically for a range of the dimensionless numbers that characterize an important application for this system. Selectivity is shown to be favored by low interfacial concentrations of bothgases but particularly of the component reacting instantaneously; it is also favored by high concentrations of the non-volatile liquid reactant. Selectivity can be high while the r&e of transfer of the selective component can also be large. Good mixing can further help the selectivity if this does not significantly reduce the bulk concentrations of the non-volatile reactant. A boundary condition of the film theory often imposed on such systems is shown to be unnecessary.