Gas-phase backmixing in bubble-column reactors

Journal Article · Wed Jul 01 00:00:00 EDT 1992 · AIChE Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690380705· OSTI ID:6997733

Shetty, S A; Kantak, M V ^[1]; Kelkar, B G ^[2]

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1. Tulsa Univ., OK (United States). Dept. of Chemical Engineering
2. Tulsa Univ., OK (United States). Dept. of Petroleum Engineering

In this paper gas-phase backmixing and holdup for the air-water system are measured in 0.15- and 0.25-m-dia. bubble columns. A two-bubble-class hydrodynamic model is proposed to predict the gas-phase backmixing in bubble column reactors. The model assumes a bimodal distribution of the gas phase with large bubbles flowing in a plug-flow manner and the small bubbles partially backmixed. The model only needs easily measurable parameters and has been validated by comparing experimental as well as literature data on gas-phase backmixing with the model predictions. The model is more realistic than the conventional single-bubble-class model and provides a rational approach to predict the gas-phase backmixing in scaling-up bubble-column reactors.

• OSTI ID: 6997733
• Journal Information: AIChE Journal (American Institute of Chemical Engineers); (United States), Journal Name: AIChE Journal (American Institute of Chemical Engineers); (United States) Vol. 38:7; ISSN AICEA; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ANALYTICAL SOLUTION
BUBBLES
CHEMICAL REACTORS
DISPERSIONS
FLOW MODELS
FLUID MECHANICS
FLUIDS
GASES
HYDRODYNAMICS
HYDROGEN COMPOUNDS
MATHEMATICAL MODELS
MECHANICS
MIXTURES
OXYGEN COMPOUNDS
PHASE STUDIES
WATER