Gas holdup and solids dispersion in a three-phase slurry bubble column

Journal Article · Thu Nov 01 04:00:00 EST 1990 · A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690361114· OSTI ID:5726446

Bukur, D B; Patel, S A; Daly, J G ^[1]

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1. Kinetics, Catalysis and Reaction Engineering Lab., Dept. of Chemical Engineering, Texas A and M Univ., College Station, TX (US)

Studies with three-phase systems in bubble columns have shown that the effect of solids on gas holdup depends on a variety of factors. Important among these are: liquid properties and particle properties such as density, size and concentration in the slurry, and wettability. Most of these studies have been made with cold flow systems; and the data at high temperatures and pressures, i.e., with systems of potential industrial importance, are rare. The objective of this paper is to obtain hydrodynamic data at elevated temperatures using a three-phase system of importance to FTS. In particular, the effects of solids type, size and concentration on gas holdup and axial solids dispersion were investigated. Two types of solids used, iron oxide and silica, simulate typical catalysts and supports, respectively, employed in FTS. A wider range of gas velocities (up to 0.12 m/s) than those used by Deckwer et al, ({lt}0.04 m/s) was employed in this study. Additionally, data were obtained from experiments conducted with slurry circulation (continuous mode of operation), whereas all the previous studies with molten waxes were conducted in the batch mode of operation (without liquid flow).

• OSTI ID: 5726446
• Journal Information: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States), Journal Name: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (United States) Vol. 36:11; ISSN AICEA; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408 -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BUBBLES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA ANALYSIS
DENSITY
DISPERSIONS
FISCHER-TROPSCH
FISCHER-TROPSCH SYNTHESIS
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
FLUIDS
HYDRODYNAMICS
IRON COMPOUNDS
IRON OXIDES
LIQUIDS
MATHEMATICAL MODELS
MECHANICS
MINERALS
MIXTURES
MOBIL PROCESS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHASE STUDIES
PHYSICAL PROPERTIES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SLURRIES
SOLIDS
SUSPENSIONS
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0400-1000 K
TRANSITION ELEMENT COMPOUNDS
WETTABILITY