Abstract
Two- and three-phase hydrodynamic studies were conducted in an air lift bubble column with an internal loop. The bubble column had a conical distributor at the bottom, through which the gas was sparged, creating a liquid or slurry circulation from the draft tube to be annular region. The axial position of the draft tube was varied with respect to the conical section. The experiments were performed with the air-water system at ambient conditions, using siliceous sand as the solid phase. When the bottom of the draft tube was located precisely at the transition between the conical and cylindrical regions, no liquid circulation was observed. When the draft tube was located in a lower position, liquid circulation started and its magnitude increased as the draft tube was further lowered inside the conical region. The results presented indicate that the hydrodynammic behaviour of these systems can be effectively controlled by varying the axial position of the draft tube.
Original language | English (US) |
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Pages (from-to) | 155-160 |
Number of pages | 6 |
Journal | The Chemical Engineering Journal and The Biochemical Engineering Journal |
Volume | 60 |
Issue number | 1-3 |
DOIs | |
State | Published - Dec 1995 |
Externally published | Yes |
Keywords
- Air/lift reactor
- Draft tube
- Slurry bubble column
ASJC Scopus subject areas
- Biochemistry