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|Title:||Process intensification of gas-liquid flows with a novel constricted oscillatory-meso tube|
Vicente, A. A.
Teixeira, J. A.
bubble size distribution
|Citation:||Reis, N.; Mena, Pedro; Rocha, Fernando; Vicente, António A.; Teixeira, José A., Process intensification of gas-liquid flows with a novel constricted oscillatory-meso tube. GLD-8 - 8th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering. New Delhi, India, Dec 16-19, 2007.|
|Abstract(s):||A novel constricted meso-tube (4.4. mm internal diameter) operated with oscillatory flow mixing has recently demonstrated enhanced volumetric mass transfer coefficients ( kLa) for continuous gas-liquid flows. Values of kLa up to 0.16 s-1 were obtained with a very low air-inflow rate (QG = 0.28 ml min-1) for the continuous running of a liquid phase (QL = 1.58 ml min-1), while in the presence of fluid oscillations. This is a one-order of magnitude improvement in the O2 transfer efficiencies in comparison with those values typically found for the most common-aerated reactors (e.g. stirred tank reactor, bubbles column, air-lift reactor). The design of novel multiphase, scaled-down reactors based on this novel tube’s geometry allows the intensification of gas-liquid flow processes through reducing the required processing volumes and the improved performance in terms of mixing, residence times and mass transfer. As a correct design does require a full understanding of the mass transfer processes, the different contributions of the mass transfer coefficient and the gas-liquid interfacial area in the global kLa enhancement were explored and herein reported|
|Description:||GLD-8 - 8th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering|
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