Modelling of liquid dispersion in trickle-bed reactors: Capillary pressure gradients and mechanical dispersion

K. Lappalainen, V. Alopaeus, Mikko Manninen, S. Kallio

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Modelling is one of the most significant prospective tools for design and analysis of trickle-bed reactors. Unfortunately current hydrodynamic models, developed on laboratory experiments, often work poorly in industrial scale. Therefore physically more authentic models are required, in which the small scale phenomena are separated from the large-scale phenomena. This would improve the scale-up of the model, and consequently its applicability to industrial-scale reactors. One of the reasons, why current models fail in industrial-scale reactors, is that radial distribution of liquid is not considered in the model development. Here models for liquid distribution, caused by capillary pressure gradients and mechanical dispersion, are suggested and the outline of the implementation of these models to CFD programs is presented. Laboratory experiments and CFD simulations of the experimental setup are performed to gain better understanding about liquid radial distribution. The physical validity of the presented models is assessed on the consistency between the experimental and the modelled liquid flow profiles.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication11th International Conference on Multiphase Flow in Industrial Plants, MFIP 2008
Publication statusPublished - 2008
MoE publication typeA4 Article in a conference publication
Event11th International Conference on Multiphase Flow in Industrial Plants, MFIP 2008 - Palermo, Italy
Duration: 7 Sep 200810 Sep 2008

Conference

Conference11th International Conference on Multiphase Flow in Industrial Plants, MFIP 2008
Abbreviated titleMFIP 2008
CountryItaly
CityPalermo
Period7/09/0810/09/08

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