Hydrodynamics and axial mixing in a three-phase bubble column. effects of slurry properties

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200025a021· OSTI ID:6612425

Kelkar, B G; Carr, N L; Shah, Y T

The hydrodynamics and mixing properties were studied with three phases (gas, liquid, and solid) flowing cocurrently upward in a column. The effects of gas and slurry velocities, solid physical properties, particle size, solids concentration, interfacial tension, and slurry viscosity on phase holdups and axial dispersion coefficients were examined. The phase holdups as well as axial dispersion coefficients were not significantly affected by particle size, solids concentration, and slurry velocities. However, solids wettability was found to enhance the coalescence tendencies in the liquid phase, and hence it decreased the axial dispersion coefficient compared to the ones for water. Addition of surfactants increased the gas holdup and slightly decreased the axial dispersion coefficient. However, an increase in the liquid viscosity reduced both the gas holdup and dispersion coefficients. The results are compared with those reported in the literature and are explained by the drift flux approach and Zuber-Findley theory.

• Research Organization: Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
• OSTI ID: 6612425
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 23:2; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ADDITIVES
AXIAL SYMMETRY
DISPERSIONS
EXTRACTION APPARATUSES
EXTRACTION COLUMNS
FLUID FLOW
FLUID MECHANICS
GAS FLOW
HYDRODYNAMICS
LIQUID FLOW
MECHANICS
MIXTURES
MULTIPHASE FLOW
PARTICLE SIZE
PHYSICAL PROPERTIES
SEPARATION EQUIPMENT
SIZE
SLURRIES
SOLIDS
SURFACTANTS
SUSPENSIONS
SYMMETRY
WETTABILITY