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Publication detail

Verification of mathematical model for displacement washing of kraft pulp fibres
Authors: Arora Shelly | Potůček František
Year: 2012
Type of publication: článek v odborném periodiku
Name of source: Indian Journal of Chemical Technology
Publisher name: National Institute of Science Communication and Information Resources (NISCAIR)
Place: New Delhi
Page from-to: 140-148
Titles:
Language Name Abstract Keywords
cze Verifikace matematického modelu pro vytěsňovací praní vláken ze sulfátové buničiny Vytěsňovací praní sulfátové buničiny bylo studováno na sestaveném dynamickém modelu této operace. K popisu proudění přes vláknité lože se používalo Pecletova a Biotova čísla. Koncentrace zachycené kapaliny ve vláknitém loži odpovídala Langmuirově izotermě. porozita vláknitého lože; vytěsňovací praní; sulfátová buničina; langmuirova izoterma
eng Verification of mathematical model for displacement washing of kraft pulp fibres A transient mathematical model has been followed to study the displacement washing of pulp bed composed of porous, compressible and cylindrical shaped fibres. The flow pattern of wash liquid through the bed can be described by a dispersion flow model involving Peclet number and Biot number. The effect of porosity along with Peclet number and Biot number on the solution profile of exit solute concentration via breakthrough curves has been studied. Concentration of solute adsorbed on fibre surface and intrapore solute concentration are related by Langmuir adsorption isotherm. Displacement washing has been simulated using a laboratory washing cell. Five runs of experiments have been performed on pulp beds formed from unbeaten, unbleached kraft fibres to check the authenticity of theoretical results. Axial dispersion coefficient is found to be influenced by interstitial velocity as well as the bed consistency. Washing process is affected collectively by Peclet number, Biot number and bed porosity. axial dispersion coefficient; bed porosity; displacement washing; kraft pulp fibre; Langmuir isotherm