On the effect of gap size between baffle outer diameter and tube inner diameter on the mixing characteristics in an oscillatory-baffled column
✍ Scribed by Xiongwei Ni; Colin C Stevenson
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1999
- Tongue
- English
- Weight
- 145 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
We report our experimental investigation on the effect of gaps between baf¯e outer diameter and inner tube diameter on the mixing characteristics, in terms of mixing time and axial dispersion coef®cient, in a batch oscillatory-baf¯ed column. Local concentration pro®les are measured using conductivity probes at two locations along the height of the column. The mixing time was determined based on the equilibrium concentration concept, and the axial dispersion coef®cient was obtained by solving the axial dispersion governing equation. Comparison of mixing time between the push-®t' and loose-®t' baf¯e arrangements was carried out and the results showed that the existence of a gap of various sizes between the baf¯e outer and the tube diameters lengthened the time at which the state of uniform mixing is achieved in such a device.