Behavior of mixed ZnO and SiO_2 nano-particles in magnetic field assisted fluidization  

作　　者：Ping Zeng Yao Zhou Guanqun Chen Qingshan Zhu 

机构地区：[1]School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China [2]Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《China Particuology》2007年第1期169-173,共5页

摘　　要：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.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.

关 键 词：NANO-PARTICLE FLUIDIZATION Magnetic fluidized bed Coarse magnet MIXTURE 

分 类 号：TQ630.1[化学工程—精细化工] O482.5[理学—固体物理]