Heat transfer investigations in a slurry bubble column: Quarterly report of the period April--June 1988

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6930104

Saxena, S C; Vadivel, R; Verma, A K

Detailed measurements of gas holdup in the small 10.8 cm diameter column have been completed for the two-phase air-water system. Experiments have been conducted in the semi-batch mode as well as in the continuous mode as a function of air velocity. Experiments are done to see the influence, if any, of the 19 mm diameter axial probe in the column on air holdup. The experiments are also conducted for the three-phase, air-water-glass bead system, and phase holdup are measured as a function of air velocity, water column height, solids concentration, and with and without the presence of an axial heat transfer probe. The heat transfer coefficient between the single axial 19 mm diameter probe and the three-phase dispersion is measured as a function of time, air velocity and solids concentration. In order to understand the mechanism of heat transfer, the variation of local temperature history of an element of the heater surface is recorded for the two-and three-phase systems. Two pressure profile measuring devices for the larger 30.5 cm diameter slurry bubble column have been completed and measurements of gas holdup as a function of air velocity, initial water column height, and with and without the presence of heat transfer probe are reported for the two-phase air-water system. Interpretation of the gas holdup data both total and local is completed on the basis of available correlations. The heat transfer data are examined and analyzed on the basis of data of the other workers, correlation and theoretical models. 18 refs., 12 figs., 2 tabs.

• Research Organization: Illinois Univ., Chicago (USA). Dept. of Chemical Engineering
• DOE Contract Number: AC22-86PC90008
• OSTI ID: 6930104
• Report Number(s): DOE/PC/90008-T4; ON: DE88015482
• Country of Publication: United States
• Language: English

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10 SYNTHETIC FUELS
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420400 -- Engineering-- Heat Transfer & Fluid Flow
AIR
BUBBLES
CHEMICAL REACTORS
CORRELATIONS
DATA ANALYSIS
DISPERSIONS
DOCUMENT TYPES
ENERGY TRANSFER
FLUID FLOW
FLUIDS
GASES
HEAT TRANSFER
HYDROGEN COMPOUNDS
MIXTURES
MULTIPHASE FLOW
OXYGEN COMPOUNDS
PROGRESS REPORT
SLURRIES
SOLIDS
SUSPENSIONS
TIME DEPENDENCE
VELOCITY
WATER