CFD simulation for reduction of pyrolusite in fluidized beds--颗粒学报PARTICUOLOGY

Zhu, J., Liu, Q., Zou, Z., Zhu, Q., Li, H., & Li, H. (2023). CFD simulation for reduction of pyrolusite in fluidized beds. Particuology, 79, 109-120. https://doi.org/10.1016/j.partic.2022.10.011

CFD simulation for reduction of pyrolusite in fluidized beds

Jingyi Zhu ^{a b}, Qi Liu ^{a b}, Zheng Zou ^{a b}, Qingshan Zhu ^{a b *}, Hongzhong Li ^{a b *}, Haoran Li ^{b c}

a State Key Laboratory of Multi-phase Complex Systems, Institute of Processing Engineering, Chinese Academy of Sciences, Beijing, 100190, China
b University of Chinese Academy of Sciences, Beijing, 100049, China
c State Key Laboratory of Biochemical Engineering, Institute of Processing Engineering, Chinese Academy of Sciences, Beijing, 100190, China

10.1016/j.partic.2022.10.011

Volume 79, August 2023, Pages 109-120

Received 8 August 2022, Revised 5 October 2022, Accepted 20 October 2022, Available online 1 November 2022, Version of Record 24 January 2023.

E-mail: qszhu@ipe.ac.cn; hzli@ipe.ac.cn

Highlights

Abstract

In this study, a CFD model coupled with heterogeneous flow structure, mass transfer equations, and chemical reaction kinetics is established to forecast the pyrolusite reduction reaction behavior. Compared with the previous studies which ignore the volume change of solids phase, the influence of volume shrinkage on reaction and flow behavior is explored in this research. Volume shrinkage of pyrolusite is proved to be non-negligible in predicting the conversion rate. The negligence of volume shrinkage leads to the overestimation of conversion rate for its inaccurate estimation of surface area for reaction. Besides, the influence of volume shrinkage on the reaction is found smaller in the scaled-up reactor.

Graphical abstract

Keywords

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