Liquid residence time distribution in the film flow monolith reactor
| Autor: | Paul J. M. Lebens, Achim Karl-Erich Heibel, Jack W. Middelhoff, Jacob A. Moulijn, Freek Kapteijn |
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| Rok vydání: | 2004 |
| Předmět: |
Dye tracer
geography Environmental Engineering Materials science geography.geographical_feature_category business.industry General Chemical Engineering Laminar flow Mechanics Computational fluid dynamics Residence time distribution Standard deviation visual_art visual_art.visual_art_medium Deconvolution Ceramic Monolith business Simulation Biotechnology |
| Zdroj: | AIChE Journal. 51:122-133 |
| ISSN: | 1547-5905 0001-1541 |
| DOI: | 10.1002/aic.10288 |
| Popis: | An experimental method and data analysis procedure are introduced to determine the liquid residence time distribution (RTD) of monoliths based on the imperfect pulse injection of a dye tracer. Repeatable experiments for two different lengths allowed for the deconvolution of the RTD function of a 375-mm-long monolith section with 3.64-mm2 channels out of dense ceramic material. The experimentally determined liquid saturations are in fair agreement with the predictions of computational fluid dynamics (CFD) calculations, assuming uniform corner flow in the square channels. The laminar film flow results in strong tailing of the RTD curves and large reduced standard deviation values. Despite the reasonable agreement for the mean residence time the CFD model based on uniform liquid distribution over the monolith channels and the individual channel corners failed to describe the experimentally determined reduced RTD curves. Applying a measured corner-scale liquid distribution pattern in combination with the CFD model resulted in good agreement with the experiments. Furthermore, this approach also improved the agreement between measurement and model for the mean residence time. © 2004 American Institute of Chemical Engineers AIChE J, 51: 122–133, 2005 |
| Databáze: | OpenAIRE |
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