Behavior of mixed ZnO and SiO<sub>2</sub> nano-particles in magnetic field assisted fluidization_中国颗粒学会

Behavior of mixed ZnO and SiO<sub>2</sub> nano-particles in magnetic field assisted fluidization_中国颗粒学会

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Partic. vol. 5 no. 1-2 pp. 169-173 (April 2007)
doi: 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

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zhoutao@mail.csu.edu.cn

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.

Keywords

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