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Micromixing performance of the teethed high shear mixer under semi-batch operation

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Abstract

Semi-batch operated reaction processes are necessary for some competitive reaction systems to achieve a desirable process selectivity and productivity of fine chemical products. Herein the structural and operating parameters of the teethed high shear mixers were adjusted to study the micromixing performance in the semi-batch operated system, using the Villermaux/Dushman reaction system. The results indicate that the rising of the rotor speed and the number of rotor teeth, the decrease of the width of the shear gap and the radial distance between the feed position and the inner wall of stator can enhance the micromixing level and lead to the decrease of the segregation index. Additionally, computational fluid dynamics calculations were carried out to disclose the evolution of the flow pattern and turbulent energy dissipation rate of the semi-batch operated high shear mixer. Furthermore, the correlation was established with a mean relative error of 8.05% and R2 of 0.955 to fit the segregation index and the parameters studied in this work, which can provide valuable guidance on the design and optimization of the semi-batch operated high shear mixers in practical applications.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 22090034, U20A20151, 21776179) and Chemistry and Chemical Engineering Guangdong Laboratory (Grant No. 1922015).

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China

    Xiaoning Li, Lin Yang, Junheng Guo, Wei Li & Jinli Zhang

  2. Department of Geotechnical Engineering, Tongji University, Shanghai, 200092, China

    Mingliang Zhou

  3. School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China

    Jinli Zhang

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  1. Xiaoning Li
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  2. Lin Yang
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  3. Junheng Guo
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  4. Wei Li
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Correspondence to Mingliang Zhou or Jinli Zhang.

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Li, X., Yang, L., Guo, J. et al. Micromixing performance of the teethed high shear mixer under semi-batch operation. Front. Chem. Sci. Eng. 16, 546–559 (2022). https://doi.org/10.1007/s11705-021-2069-3

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  • DOI: https://doi.org/10.1007/s11705-021-2069-3

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