Modelling of displacement washing of packed bed of fibers
| Autor: | Shelly Arora, František Potůček |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Packed bed
Chromatography Materials science Biot number General Chemical Engineering Langmuir adsorption model lcsh:TP155-156 Péclet number Peclet number symbols.namesake Adsorption Mathematical model Displacement Washing symbols Fiber Composite material lcsh:Chemical engineering Dispersion (chemistry) Displacement (fluid) |
| Zdroj: | Brazilian Journal of Chemical Engineering v.26 n.2 2009 Brazilian Journal of Chemical Engineering Associação Brasileira de Engenharia Química (ABEQ) instacron:ABEQ Brazilian Journal of Chemical Engineering, Vol 26, Iss 2, Pp 385-393 (2009) Brazilian Journal of Chemical Engineering, Volume: 26, Issue: 2, Pages: 385-393, Published: JUN 2009 |
| Popis: | The mechanism of displacement washing of packed bed of porous, compressible and cylindrical particles, e.g., fibers, is presented with the help of an axial dispersion model involving Peclet number (Pe) and Biot number (Bi). Bulk fluid concentration, intra-pore solute concentration and concentration of solute adsorbed on the fiber surface are taken to be the function of washing time and position in the bed. Concentration of solute adsorbed on the fiber surface and intra-pore solute concentration are related by a Langmuir adsorption isotherm. Experiments have been performed on pulp beds formed from unbeaten, unbleached kraft fibers. Displacement washing has been simulated using a laboratory washing cell. Model equations are solved by using orthogonal collocation on finite elements (OCFE). Model predicted values are compared with the experimental values and key industrial parameters such as displacement ratio and efficiency are expressed in terms of exit and average solute concentrations. |
| Databáze: | OpenAIRE |
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