State Key Laboratory Breeding Base of Green Chemistry Synthesis
Technology, Zhejiang University of Technology, Hangzhou 310032, PR
China.
* Corresponding author:lcszjcn@zjut.edu.cn;
* *Corresponding author:yiliu@zjut.edu.cn;
xnli@zjut.edu.cn;
KEYWORDS: ceramic membrane, multi-scale bubbles, internals,
bubble trajectory, coalescence
Abstract: The distribution of gas-liquid two-phase flow is one
of significant effects on heterogeneous catalytic reactions. Ceramic
membrane gas distributors (CMGD) were applied in improving gas-liquid
distribution, and flow behavior of gas as dispersed phase in liquid
phase was visualized via high-speed photograph. The average diameters of
multi-scale bubbles were measured and modeled ranging from
10-5 to 10-2 m. The coalescence and
trajectory of bubbles during rising process were observed, and two
typical trajectories straight and spiral types were tracked. In order to
inhibit coalescence of bubbles during rising process, internals
manufactured by 3D printing were installed in the channel of ceramic
membrane. The average bubble size of CMGD decreases 12% from 392 to 345
μm compared to that of the original CMGD. The CMGD with internals
enhances the heterogeneous catalytic reaction performance via providing
large quantity of stabile multi-scale bubbles which could match the
porous structure of catalyst.