Multiple hydrodynamic states in cocurrent two-phase downflow through packed beds
Pressure drop determinations on a 25 mm ID acrylic column packed with 0.5, 1.0, and 1.8 mm dia glass spheres to heights of 45-80 cm at 1.0-10 kg/sq m/sec water flow rates and 0.02-1.0 kg/sq m/sec air flow rates showed that multiple steady states were possible for two-phase cocurrent flow in beds with such small packings. The pressure drop was a function of the flow rate, phase properties, packing size, and maximum gas flow rate. Liquid holdup, on which most design work is based, was significantly different in the different steady states for identical gas and liquid flow rates. Such small packings are not common in trickle-bed crude oil hydrodesulfurization but may become so in immobilized enzyme reaction systems.
- Research Organization:
- Univ. of Queensland
- OSTI ID:
- 6986660
- Journal Information:
- Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 17:4; ISSN IEPDA
- Country of Publication:
- United States
- Language:
- English
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