关键字：SLURRY BUBBLE-COLUMN; SIZE DISTRIBUTION; HEAT-TRANSFER; LIQUID; REACTOR; GAS; FLOW; ABSORPTION; VELOCITY; BEHAVIOR

摘要：In gas-liquid-solid three-phase systems, solid particles affect differently the flow, mass transfer (MT), and reaction processes of the gas-liquid phases. However, the detailed effects of particle characteristics on bubble behavior and MT have yet to be fully elucidated. In this paper, using a gas-liquid-solid system consisting of airwater-polymethyl methacrylate particles (PMMA), the effects of particle concentration and particle diameter on bubble dynamics and MT characteristics in a bubble column reactor (BCR) were investigated by image analysis method and dynamic oxygen absorption technology under the wire mesh-coupled solid particles reinforcement means. The findings indicate that an increase in particle concentration and a reduction in particle diameter leads to a decrease in the volumetric liquid-phase mass transfer coefficient (KLa), as well as a decline in gas holdup. When the particle concentration increases to 5 %, the strengthening effect of the coupling reinforcement means diminishes. A novel empirical correlation formula of KLa was established to predict the effects of three key parameters, of particle diameter, particle concentration and superficial gas velocity on the gas-liquid MT process, and the predicted values have good consistency with the experimental values.

卷号：219

期号：

是否译文：否