Abstract
Gas holdup in highly viscous fluid in two-phase bubble column with a single sparger operated continuously with respect to the gas flow and batch wise with respect to the liquid was studied using bed expansion technique. Two- and three-dimensional columns of the same effective cross-sectional area were studied. Seven viscous fluid were used, including light oil, machine oil, and engine oil. In the two-dimensional bubble column, small and nearly uniform bubbles were observed at low gas flow rates in all seven viscous liquids used, for different bed heights. Gas holdup increased with increasing gas velocity, and decreased with increasing static bed height and liquid viscosity in both geometries. Gas holdup in the bi-dimensional bubble column was ∼ 40% less than that in cylindrical bubble column. Hydrodynamically, the two systems were different, Bi-dimensional column was characterized by bubbling flow regime, while, the cylindrical bubble column was characterized by churn turbulent flow regime. Two correlations that fit the data of gas holdup as a function of all the investigated variables were established.
Original language | English (US) |
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Pages (from-to) | 403-408 |
Number of pages | 6 |
Journal | Chemical Engineering and Processing: Process Intensification |
Volume | 42 |
Issue number | 5 |
DOIs | |
State | Published - May 2003 |
Keywords
- Bubble columns
- Gas holdup
- Single sparger
- Two and three dimensional columns
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering