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Bubble Column and Fluidized Bed Hydrodynamics

 

Research Goal
The long-term goals of this research effort are to characterize and quantify the mechanisms that are involved in the hydrodynamic and transport processes in complex multiphase flows to improve process performance.

Background
A bubble column is a contactor in which a discontinuous gas phase, in the form of bubbles, moves relative to a continuous phase, which can be a liquid or liquid-solid suspension. Bubble columns are widely used to affect gas-liquid or gas-liquid-solid transport processes, which are found in many process industries. Past research conducted in our laboratory utilized fiber systems as the solid phase. Other solid particles are also being considered.

Fluidized beds contain solid particles in which a gas stream “fluidizes” the particles. These systems have similar hydrodynamics to those of bubble columns and are used in many processes. This research is addressing the bed hydrodynamics in biomass fluidized bed gasifiers.

Funding Sources

  • National Science Foundation (NSF)
  • United States Department of Agriculture (USDA)
  • Iowa State University
  • Grow Iowa Values Fund
Major Equipment
10.2 cm Semi-Batch Bubble Column
(Picture | Schematic)

15.2 cm Semi-Batch Bubble Column
(Picture | Schematic)

32.1 cm Semi-Batch Bubble Column
(Picture | Schematic)

15.2 cm Cocurrent Bubble Column
(Picture | Schematic)

15.2 cm Fluidized Bed
(link to picture when available)

Sample Results10.2 cm Semi-Batch Bubble Column

(Slide 1 | Slide 2)

15.2 cm Semi-Batch Bubble Column
(Slide 1 | Slide 2 | Slide 3 | Slide 4 | Slide 5)

32.1 cm Semi-Batch Bubble Column
(Slide 1 | Slide 2 | Slide 3 | Slide 4)

15.2 cm Cocurrent Bubble Column
(Slide 1 | Slide 2 | Slide 3 | Slide 4 | Slide 5)