Comparative study of gas-liquid mass transfer coefficients in stirred autoclaves, tubing bomb microreactors, and bubble columns

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

DOI:https://doi.org/10.1021/i200024a010· OSTI ID:6429630

Gollakota, S V; Guln, J A

The relative gas-liquid contacting coefficients were examined for three reactor types commonly used for direct coal liquefaction. These reactors were the tubing bomb microreactor (TBMR), the magnetically driven batch autoclave with gas-inducing impeller, and the bubble column. The same chemical system, sulfite oxidation in the presence of cobaltous ion catalyst, was used in comparing the performance of the various reactors. Experimental results were obtained in this work for the TBMR and the stirred autoclave, while literature values using sulfite oxidation were utilized for bubble column characterization. The effect of two particle sizes of inert solids on the gas-liquid mass transfer parameters also was determined. The TBMR was the most effective gas-liquid contacting device, with interfacial areas up to 28 cm/sup -1/ being realized. Using literature results obtained with the sulfite oxidation system, the bubble column was found to have comparatively low mass transfer coefficients. Generally, small particles had little effect up to 40 wt % loading, although significant increases were obtained in certain instances in the stirred autoclave reactor.

• Research Organization: Department of Chemical Engineering, Auburn University, Auburn, Alabama
• OSTI ID: 6429630
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Vol. 23:1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHEMICAL REACTORS
COMPARATIVE EVALUATIONS
MASS TRANSFER
COAL LIQUEFACTION
AUTOCLAVES
CATALYTIC EFFECTS
COBALT COMPOUNDS
GASES
LIQUIDS
OXIDATION
SULFITES
CHEMICAL REACTIONS
FLUIDS
LIQUEFACTION
OXYGEN COMPOUNDS
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction