Cyclic variation of the liquid flow residence time in periodically operated

The cyclic variation of the mean residence time of the liquid phase is investigated in a trickle-bed reactor operated with a liquid feed rate modulated in a periodic square wave pattern. Experiments made using a salt tracer method are compared to a residence time model, based on the concept of conti...

Full description

Saved in:
Bibliographic Details
Published inChemical engineering science Vol. 62; pp. 1230 - 1238
Main Authors Borremans, D., Rode, S., Wild, G.
Format Journal Article
LanguageEnglish
Published Elsevier 2007
Subjects
Chemical and Process Engineering
Engineering Sciences
Porous media
Trickle-bed reactor
Multiphase reactors
Hydrodynamics
Periodic operation
Online AccessGet full text

Cover

More Information
Summary:The cyclic variation of the mean residence time of the liquid phase is investigated in a trickle-bed reactor operated with a liquid feed rate modulated in a periodic square wave pattern. Experiments made using a salt tracer method are compared to a residence time model, based on the concept of continuity shock waves. The model predicts accurately the mean residence times and their cyclic variation in case of a non-zero base liquid flow rate. A particular application of the model is the adjustment of the feed cycle parameters in order to obtain a constant residence time of the liquid, no matter the moment at which it enters the bed. This particular cycle duration depends, among others, on the feed rates, but also on the bed length.
ISSN:0009-2509
DOI:10.1016/j.ces.2006.05.052