Constrained inverse fluidization of light particles in a draft tube airlift reactor(Article)
- aDepartment of Chemical Engineering, Faculty of Technology, University of Novi Sad, Bul. Cara Lazara 1, 21000 Novi Sad, Serbia
- bChemical and Biological Engineering Department, University of British Columbia, 2360 East Mall, V6T 1Z3, Vancouver, Canada
- cDepartment for Computing and Automatics, Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
Abstract
The objective of this work was to investigate the main fluidodynamic behavior of a constrained inverse fluidized bed in a draft tube airlift reactor (DT-ALR), with liquid in batch and air in continuous mode. The inverse fluidized bed was formed of relatively large particles (4.3-5.4 mm) that were composed of light polyethylene (PE), in the first case, and of particles (3.7-4.7 mm) that were composed of extremely light polystyrene (PS), in the second case. The influence of physical properties of liquid phase (surface tension and viscosity) on basic fluidodynamic characteristics was examined using the coalescence-inhibiting medium (1 wt % aqueous solution of ethanol) and viscous medium (46 wt % aqueous solution of sucrose). It is shown that the overall gas holdup, induced liquid velocity, minimum fluidization velocity, and bed expansion are dependent on the superficial gas velocity and liquid and solid properties. © 2009 American Chemical Society.
Indexed keywords
| Engineering uncontrolled terms | Air-lift reactorsAqueous solutionsBed expansionContinuous modeDraft tubesGas hold upInverse fluidizationLarge particlesLight particlesLiquid PhaseLiquid velocitiesMinimum fluidization velocitySuperficial gas velocitiesViscous medium |
|---|---|
| Engineering controlled terms: | Bubble columnsCoalescenceEthanolFluid dynamicsFluidizationFluidized bedsHydraulic structuresLiquidsPolystyrenesSugar (sucrose)Surface chemistrySurface tension |
| Engineering main heading: | Solutions |
- ISSN: 08885885
- CODEN: IECRE
- Source Type: Journal
- Original language: English
- DOI: 10.1021/ie801915m
- Document Type: Article
Šijački, I. M.; Department of Chemical Engineering, Faculty of Technology, University of Novi Sad, Bul. Cara Lazara 1, Serbia;
© Copyright 2009 Elsevier B.V., All rights reserved.