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

doi:10.1016/j.cjche.2021.04.011

中国化学工程学报 ›› 2022, Vol. 48 ›› Issue (8): 116-124.DOI: 10.1016/j.cjche.2021.04.011

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

Jing Xie^1,2, Xiangbi Jia^1,2, Dan Wang^1,2, Yingjiao Li^1,2, Bao-chang Sun², Yong Luo^1,2, Guang-wen Chu^1,2, Jian-feng Chen^1,2

1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
2. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2021-03-09 修回日期:2021-04-22 出版日期:2022-08-28 发布日期:2022-09-30
通讯作者: Bao-chang Sun,E-mail:sunbc@mail.buct.edu.cn;Guang-wen Chu,E-mail:chugw@mail.buct.edu.cn
基金资助:
This work was supported by National Natural Science Foundation of China (21725601).

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

Jing Xie^1,2, Xiangbi Jia^1,2, Dan Wang^1,2, Yingjiao Li^1,2, Bao-chang Sun², Yong Luo^1,2, Guang-wen Chu^1,2, Jian-feng Chen^1,2

1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
2. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Received:2021-03-09 Revised:2021-04-22 Online:2022-08-28 Published:2022-09-30
Contact: Bao-chang Sun,E-mail:sunbc@mail.buct.edu.cn;Guang-wen Chu,E-mail:chugw@mail.buct.edu.cn
Supported by:
This work was supported by National Natural Science Foundation of China (21725601).

摘要/Abstract

摘要： Microdroplets and their dispersion, with a large specific surface area and a short diffusion distance, have been applied in various unit operations and reaction processes. However, it is still a challenge to control the size and size distribution of microdroplets, especially for high-throughput generation. In 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 throughput. Then generated microdroplets can be directly dispersed into a continuous falling film for obtaining a mixture of microdroplet dispersion. In this UHS-RPB, the effects of rotational speed, liquid initial velocity, liquid viscosity, liquid surface tension and packing pore size on the average size (d₃₂) and size distribution of microdroplets were systematically investigated. Results showed that the UHS-RPB could produce microdroplets with a d₃₂ of 25–63?μm at a liquid flow rate of 1025 L·h^?1, and the size distribution of the microdroplets accords well with Rosin–Rammler distribution model. In addition, a correlation was established for the prediction of d₃₂, and the predicted d₃₂ 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

Abstract: Microdroplets and their dispersion, with a large specific surface area and a short diffusion distance, have been applied in various unit operations and reaction processes. However, it is still a challenge to control the size and size distribution of microdroplets, especially for high-throughput generation. In 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 throughput. Then generated microdroplets can be directly dispersed into a continuous falling film for obtaining a mixture of microdroplet dispersion. In this UHS-RPB, the effects of rotational speed, liquid initial velocity, liquid viscosity, liquid surface tension and packing pore size on the average size (d₃₂) and size distribution of microdroplets were systematically investigated. Results showed that the UHS-RPB could produce microdroplets with a d₃₂ of 25–63?μm at a liquid flow rate of 1025 L·h^?1, and the size distribution of the microdroplets accords well with Rosin–Rammler distribution model. In addition, a correlation was established for the prediction of d₃₂, and the predicted d₃₂ 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.

Key words: Ultra-high speed rotating packed bed, Microdroplet, Controllable preparation, High throughput

Jing Xie, Xiangbi Jia, Dan Wang, Yingjiao Li, Bao-chang Sun, Yong Luo, Guang-wen Chu, Jian-feng Chen. Controllable and high-throughput preparation of microdroplet using an ultra-high speed rotating packed bed[J]. 中国化学工程学报, 2022, 48(8): 116-124.

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

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

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