Study of multiphase flow useful to understanding scaleup of coal-liquefaction reactors. Technical progress report, March 1, 1983-May 31, 1983

Technical Report · Wed Jun 01 04:00:00 EDT 1983

OSTI ID:5888928

Knickle, H N

Gas-holdup measurements for air and aqueous carboxy methyl cellulose solutions have been performed using the 13-inch acrylic column. The experimental data has been plotted and some is reported here. Analysis is continuing. A 1/4-inch-thick porous plate with 70-micrometer pores made of polyethylene and an acrylic sieve plate with 1/8-inch-diameter holes were used as gas distributors. Holdup was measured at different axial positions and compared to total holdup measurements by summing. The gas velocity range extended over the bubble and bubble-slug patterns. Analysis of these experiments will be reported later. Gas holdup measurements in the six-inch column have been measured for air-water mixtures using 17 different gas distributions. The results have been analyzed for the effect of the distributor on holdup in a bubble column. The variables included thickness, material, hydrophobic versus hydrophylic, and porosity. The major difference in gas-holdup measurements occurred when comparing sieve plates and porous plates. Specific differences were found when comparing the porous plates at the transition between bubble and bubble-slug flow patterns. The gas holdup at the transition varied between 0.21 and 0.34. Thus, the slope of the gas in the bubble also varied. The holdup in the transition range also varied. Gas velocity at the transition ranged between 0.055 to 0.085 m/s for different porous distributions. Conclusions from these experiments are reported.

• Research Organization: Rhode Island Univ., Kingston (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-81PC40797
• OSTI ID: 5888928
• Report Number(s): DOE/PC/40797-7; ON: DE83014739
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
AIR
AQUEOUS SOLUTIONS
BUBBLES
CELLULOSE ESTERS
CHEMICAL REACTORS
COAL LIQUEFACTION
DATA
DISPERSIONS
ESTERS
EXPERIMENTAL DATA
FLUID FLOW
FLUID MECHANICS
FLUIDS
GASES
HYDROGEN COMPOUNDS
INFORMATION
LIQUEFACTION
MECHANICS
MIXING
MIXTURES
MULTIPHASE FLOW
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SOLUTIONS
STRUCTURAL MODELS
THERMOCHEMICAL PROCESSES
VELOCITY
WATER