Experimental and theoretical studies of gas-liquid mass transfer of a single bubble in a liquid-solid fluidized bed
- Ohio State Univ., Columbus, OH (USA). Dept. of Chemical Engineering
Experiments are conducted using ozone as a tracer to study the interfacial gas-liquid mass transfer behavior of a single bubble in liquid and liquid-solid fluidized media. A spectrophotometric system is developed, which consists of an ultraviolet (UV) light source, optical fibers, narrow band interference filters, UV-visible photomultipliers, and computerized fast data acquisition. Bubble size, particle properties, and bed voidage are varied to examine the axial variation of the mass transfer rate. A theoretical model is developed for the prediction of the overall gas-liquid mass transfer coefficient of a single circular-cap in a two dimensional or spherical-cap bubble in a three dimensional liquid-solid fluidized bed. The penetration concept is used to account for the mass transfer rate across the bubble roof. Two cases are considered in the evaluation of the mass transfer rate across the bubble base. The prediction of the overall mass transfer coefficient based on the model is shown to agree reasonably well with the experimental results obtained in this study.
- OSTI ID:
- 5220684
- Report Number(s):
- CONF-881143--
- Country of Publication:
- United States
- Language:
- English
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DATA
DATA ACQUISITION
EXPERIMENTAL DATA
FILTERS
FLUIDIZED BEDS
FLUIDS
INFORMATION
LIQUIDS
MASS TRANSFER
NUMERICAL DATA
OPTICAL FILTERS
PHASE STUDIES
PHOTOMULTIPLIERS
PHOTOTUBES
SLABS
SOLIDS
THEORETICAL DATA
THREE-DIMENSIONAL CALCULATIONS