Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices

doi:10.1016/j.cjche.2023.12.012

中国化学工程学报 ›› 2024, Vol. 68 ›› Issue (4): 76-82.DOI: 10.1016/j.cjche.2023.12.012

Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices

Shaoyun Wu¹, Zhuang Ma¹, Zichi Yang¹, Suying Zhao¹, Caijin Zhou¹, Huidong Zheng^1,2

1. Fujian Engineering Research Center of Advanced Manufacturing Technology for Fine Chemicals, College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China;
2. Qingyuan Innovation Laboratory, Quanzhou, 362114, China

收稿日期:2023-08-31 修回日期:2023-12-15 出版日期:2024-04-28 发布日期:2024-06-28
通讯作者: Caijin Zhou,E-mail address:zhoucj@fzu.edu.cn;Huidong Zheng,E-mail address:youngman@fzu.edu.cn
基金资助:
We gratefully acknowledge the supports of National Natural Science Foundation of China (22308057), Outstanding Talent Introduction Funds from Fuzhou University (0040-511175) and Fuzhou University Testing Fund of precious apparatus (2023T003).

Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices

Shaoyun Wu¹, Zhuang Ma¹, Zichi Yang¹, Suying Zhao¹, Caijin Zhou¹, Huidong Zheng^1,2

1. Fujian Engineering Research Center of Advanced Manufacturing Technology for Fine Chemicals, College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China;
2. Qingyuan Innovation Laboratory, Quanzhou, 362114, China

Received:2023-08-31 Revised:2023-12-15 Online:2024-04-28 Published:2024-06-28
Contact: Caijin Zhou,E-mail address:zhoucj@fzu.edu.cn;Huidong Zheng,E-mail address:youngman@fzu.edu.cn
Supported by:
We gratefully acknowledge the supports of National Natural Science Foundation of China (22308057), Outstanding Talent Introduction Funds from Fuzhou University (0040-511175) and Fuzhou University Testing Fund of precious apparatus (2023T003).

摘要/Abstract

摘要： Micromixing efficiency is an important parameter for evaluating the multiphase mass transfer performance and reaction efficiency of microreactors. In this work, the novel curved capillary reactor with different shapes was designed to generate Dean flow, which was used to enhance the liquid-liquid micromixing performance. The Villermaux-Dushman probe reaction was employed to characterize the micromixing performance in different curved capillary microreactors. The effects of experiment parameters such as liquid flow rate, inner diameter, tube length, and curve diameter on micromixing performance were systematically investigated. Under the optimal conditions, the minimum value of the segmentation factor X_S was 0.008. It was worth noting that at the low Reynolds number (Re < 30), the change of curved shape on the capillary microreactor can significantly improve the micromixing performance with X_S reduced by 37.5%. Further, the correlations of segment index X_S with dimensionless factor such as Reynolds number or Dean number were developed, which can be used to predict the liquid-liquid micromixing performance in capillary microreactors.

关键词: Microreactor, Process intensification, Micromixing performance, Dean flow

Abstract: Micromixing efficiency is an important parameter for evaluating the multiphase mass transfer performance and reaction efficiency of microreactors. In this work, the novel curved capillary reactor with different shapes was designed to generate Dean flow, which was used to enhance the liquid-liquid micromixing performance. The Villermaux-Dushman probe reaction was employed to characterize the micromixing performance in different curved capillary microreactors. The effects of experiment parameters such as liquid flow rate, inner diameter, tube length, and curve diameter on micromixing performance were systematically investigated. Under the optimal conditions, the minimum value of the segmentation factor X_S was 0.008. It was worth noting that at the low Reynolds number (Re < 30), the change of curved shape on the capillary microreactor can significantly improve the micromixing performance with X_S reduced by 37.5%. Further, the correlations of segment index X_S with dimensionless factor such as Reynolds number or Dean number were developed, which can be used to predict the liquid-liquid micromixing performance in capillary microreactors.

Key words: Microreactor, Process intensification, Micromixing performance, Dean flow

Shaoyun Wu, Zhuang Ma, Zichi Yang, Suying Zhao, Caijin Zhou, Huidong Zheng. Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices[J]. 中国化学工程学报, 2024, 68(4): 76-82.

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Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices

Enhancement of liquid-liquid micromixing performance in curved capillary microreactor by generation of Dean vortices

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