CFD simulation for reduction of pyrolusite in fluidized beds  

作　　者：Jingyi Zhu Qi Liu Zheng Zou Qingshan Zhu Hongzhong Li Haoran Li 

机构地区：[1]State Key Laboratory of Multi-phase Complex Systems,Institute of Processing Engineering,Chinese Academy of Sciences,Beijing,100190,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]State Key Laboratory of Biochemical Engineering,Institute of Processing Engineering,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Particuology》2023年第8期109-120,共12页颗粒学报（英文版）

基　　金：grateful to the National Natural Science Foundation of China(grant No.21878304 and 21736010);the Strategic Priority Research Program of the Chinese Academy of Sciences(grant No.XDA29040200);the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(grant No.21921005).

摘　　要：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.

关 键 词：Heterogeneous flow structure Chemical reaction kinetics CFD Bubbling fluidized bed Pyrolusite reduction reaction 

分 类 号：TF792[冶金工程—钢铁冶金]