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Measuring gas hold‐up in gas–liquid/gas–solid–liquid stirred tanks with an electrical resistance tomography linear probe
- Source :
- AIChE Journal. 65
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- An electrical resistance tomography (ERT) linear probe was used to measure gas hold-up in a two-phase (gas–liquid) and three phase (gas–solid–liquid) stirred-tank system equipped with a Rushton turbine. The ERT linear probe was chosen rather than the more commonly used ring cage geometry to achieve higher resolution in the axial direction as well as its potential for use on manufacturing plant. Gas-phase distribution was measured as a function of flow regime by varying both impeller speed and gas flow rate. Global and local gas hold-up values were calculated using ERT data by applying Maxwell's equation for conduction through heterogeneous media. The results were compared with correlations, hard-field tomography data, and computational fluid dynamic simulations available in the literature, showing good agreement. This study thus demonstrates the capability of ERT using a linear probe to offer, besides qualitative tomographic images, reliable quantitative data regarding phase distribution in gas–liquid systems.
- Subjects :
- Environmental Engineering
Materials science
Liquid gas
General Chemical Engineering
Analytical chemistry
gas hold-up distribution
Physics::Fluid Dynamics
gas–solid–liquid
Electrical resistance and conductance
Linear probe
Tomography
gas–liquid
Solid liquid
electrical resistance tomography
in situ measurement
Biotechnology
Subjects
Details
- ISSN :
- 15475905 and 00011541
- Volume :
- 65
- Database :
- OpenAIRE
- Journal :
- AIChE Journal
- Accession number :
- edsair.doi.dedup.....3801132a990a26c1a8ef6e14867a91b6