Behavior of mixed ZnO and SiO2 nano-particles in magnetic field assisted fluidization--颗粒学报PARTICUOLOGY

Zeng, P., Zhou, T., Chen, G., & Zhu, Q. (2007). Behavior of mixed ZnO and SiO2 nano-particles in magnetic field assisted fluidization. China Particuology, 5(1), 169–173. https://doi.org/10.1016/j.cpart.2007.01.008

Behavior of mixed ZnO and SiO₂ nano-particles in magnetic field assisted fluidization

Ping Zeng ^a, Tao Zhou ^a *, Guanqun Chen ^a, Qingshan Zhu ^b

a School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China
b Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

10.1016/j.cpart.2007.01.008

Volume 5, Issues 1–2, February–April 2007, Pages 169-173

Received 27 September 2006, Accepted 20 January 2007, Available online 6 June 2007.

E-mail: zhoutao@mail.csu.edu.cn

Highlights

Abstract

The fluidization behavior of ZnO nano-particles in magnetic fluidized bed (MFB) by adding coarse magnetic particles was investigated, followed by the co-fluidization of mixtures of ZnO and SiO₂ nano-particles. For such co-fluidization, bed expansion was found to change smoothly with gas velocity through a range of stable operation. By measuring the bed expansion ratio and pressure drop, a stability diagram for the mixture in MFB was obtained. Within this stable operation range, with increasing gas velocity the pressure drop hardly changes as the bed expands, up to an expansion ratio of more than 4.

Graphical abstract

Keywords

Nano-particle; Fluidization; Magnetic fluidized bed; Coarse magnet; Mixture

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