AXIAL-DISPERSION OF LIQUID IN GAS-LIQUID COCURRENT DOWNFLOW AND UPFLOW FIXED-BED REACTORS WITH POROUS PARTICLES

Citation
I. Iliuta et al., AXIAL-DISPERSION OF LIQUID IN GAS-LIQUID COCURRENT DOWNFLOW AND UPFLOW FIXED-BED REACTORS WITH POROUS PARTICLES, Chemical engineering research & design, 76(A1), 1998, pp. 64-72
Citations number
30
Categorie Soggetti
Engineering, Chemical
ISSN journal
02638762
Volume
76
Issue
A1
Year of publication
1998
Pages
64 - 72
Database
ISI
SICI code
0263-8762(1998)76:A1<64:AOLIGC>2.0.ZU;2-T
Abstract
The authors present the experimental investigation of the residence ti me distribution of the liquid in a gas-liquid downflow and upflow fixe d-bed reactor with porous particles and air/Newtonian or non-Newtonian liquid systems. The influence of imposed gas phase distribution along the packing bed on the axial mixing of liquid was examined. A tracer injection technique was used and the dynamic responses were interprete d using the piston-dispersion-exchange model with Danckwerts' boundary conditions. The dynamic evolution of the tracer concentration in the particles was described in terms of diffusion phenomena. An imperfect pulse method was used to estimate the model parameters directly from t he experimentally input nonideal response and output response.