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Comparison of hydrodynamic parameters for countercurrent and cocurrent flow through packed beds
Author(s) -
Iliuta Ion,
Thyrion Fernand C.,
Bolle Leon,
Giot Michel
Publication year - 1997
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270200304
Subject(s) - countercurrent exchange , mechanics , flow (mathematics) , dispersion (optics) , thermodynamics , plug flow , piston (optics) , chromatography , materials science , chemistry , physics , wavefront , optics
Hydrodynamic parameters have been determined in common equipment, i.e., same column and liquid and gas distributors, for cocurrent and countercurrent two‐phase flow through fixed beds. The piston/dispersion exchange model (PDE) with usual Danckwerts' boundary conditions (closed/closed system) has been used to describe the liquid flow. A new imperfect pulse method has been used to estimate the PDE model parameters directly from the experimentally nonideal input and output response. The transition between trickle flow and pulse flow, for two‐phase downflow, and the occurrence of flooding, for countercurrent flow, has been investigated using a macroscopic model for the two‐phase flow.