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Simulation of hydrodynamic behaviour and mass transfer efficiency of reduced pressure distillation
Author(s) -
Benadda Belkacem,
Moszkowicz Pierre,
Prost Michel,
Otterbein Michel,
Mohammedi Kamal
Publication year - 1996
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.270190404
Subject(s) - pressure drop , distillation , mass transfer , mechanics , volumetric flow rate , chemistry , fractionating column , atmospheric pressure , ethylbenzene , packed bed , theoretical plate , flow (mathematics) , tray , range (aeronautics) , chromatography , structured packing , thermodynamics , simulation , materials science , mechanical engineering , engineering , meteorology , composite material , benzene , physics , organic chemistry
A random packing hydrodynamic simulator is designed specially to carry out experiments under reduced pressures with a counter‐current flow air/water system. The simulator results (air/water system) compared to those obtained in a real packed distillation column (benzylchloride/ ethylbenzene system) show a good agreement between hydrodynamic parameters like pressure drop, flooding flow rate, and total liquid hold‐up. Empirical relationships derived from the simulator experimental results are proposed allowing the calculation of the pressure drop in a packed distillation column, operating in the pressure range between 10 kPa and atmospheric pressure. The influence of reduced pressure on the HETP in the distillation column and interfacial area in the simulator was also investigated.