ZnO和CuO混合纳米颗粒在添加FCC粗颗粒的流态化及聚团碰撞与破碎过程研究

Research on the Agglomeration Collision and Fragmentation Process in a Fluidized Bed of ZnO and CuO Composite Nanoparticles Added with FCC Coarse Particles

研究混合纳米Zn O和Cu O颗粒添加3种不同粒径FCC粗颗粒(催化裂化催化剂)的流化行为,用高速摄像机观察流化现象并对聚团碰撞与破碎过程、聚团成分进行分析。结果表明,添加FCC粗颗粒可显著改善纳米颗粒的流化性能,FCC3对纳米颗粒流化性能的改善效果比FCC1或FCC2更明显;且随着FCC粗颗粒添加量的增加,纳米颗粒流化行为的改善效果越好,体系的混合均匀程度是影响混合纳米Zn O和Cu O流化性能的重要因素。

A research has been conducted on the fluidization behaviors of Zn O and Cu O composite nanoparticles,added with FCC coarse particles of three different particle sizes（catalytic cracking catalysts）. An observation of the whole fluidization process, with the aid of a high-speed camera, has been made for a detailed analysis of the agglomeration collision and fragmentation, and agglomeration components as well. The results show that the fluidization performance of the composite nanoparticles can be improved significantly with the addition of FCC coarse particles. Moreover, compared with the other two kinds of coarse particles FCC2 or FCC1, a more significant effect can be achieved with the addition of FCC3 in the process. With the increase of the addition amount of FCC coarse particles, the improvement of the fluidization performance of the composite nanoparticles becomes more obvious. Thus, it can be concluded that the mixing uniformity of nanoparticles is an important factor that influence the fluidization performance of Zn O and Cu O composite nanoparticles.