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Controllable and high-throughput preparation of microdroplet using an ultra-high speed rotating packed bed

Chinese Journal of Chemical Engineering 2022年第8期35卷 116-124页

作者： Jing Xie Xiangbi Jia Dan Wang Yingjiao Li Bao-chang Sun Yong Luo Guang-wen Chu Jian-feng Chen State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for high Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China

Microdroplets and their dispersion,with a large specific surface area and a short diffusion distance,have been applied in various unit operations and reaction ***,it is still a challenge to control the size and size distribution of microdroplets,especially for high-throughput *** this work,a novel ultra-high speed rotating packed bed(UHS-RPB)was invented,in which rotating foam packing with a speed of 4000-12000 r·min^(-1) provides microfluidic channels to disperse liquid into microdroplets with high *** generated microdroplets can be directly dispersed into a continuous falling film for obtaining a mixture of microdroplet *** this UHS-RPB,the effects of rotational speed,liquid initial velocity,liquid viscosity,liquid surface tension and packing pore size on the average size(d_(32))and size distribution of microdroplets were systematically *** showed that the UHS-RPB could produce microdroplets with a d_(32) of 25-63μm at a liquid flow rate of 1025 L·h^(-1),and the size distribution of the microdroplets accords well with Rosin-Rammler distribution *** addi-tion,a correlation was established for the prediction of d_(32),and the predicted d_(32) was in good agreement with the experimental data with a deviation within±15%.These results demonstrated that UHS-RPB could be a promising candidate for controllable preparation of uniform microdroplets.

关键词： ultra-high speed rotating packed bed Microdroplet Controllable preparation high throughput

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