Agglomeration Mechanism of Nanoparticles by Adding Coarse Fluid Catalytic Cracking Particles. Issue 8 (4th April 2016)

• Record Type: Journal Article
• Authors: Wang, Jian; Xu, Bao; Zhou, Tao; Liang, Xizhen
• Is Part Of: Chemical engineering & technology. Volume 39:Issue 8(2016:Aug.)
• Page Start: 1490
• Page End: 1496
• Publication Date: 2016-04-04
• Subjects: Agglomeration mechanism -- Cohesion -- Core‐shell structure -- Fluid catalytic cracking -- Nanoparticles; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201500190
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: The agglomeration mechanism of SiO2, TiO2, and ZnO nanoparticles by adding coarse fluid catalytic cracking (FCC) particles is studied. The core‐shell structure of agglomerates is revealed on the basis of experimental analyses. Nanoparticles can be fluidized by forming agglomerates of the core‐shell structure with coarse FCC particles. The porosity of core‐shell structure agglomerates and the average roundness value were found to be distinctly lower than those of pure nanoparticle agglomerates. In addition, the cohesion of the core‐shell structure agglomerates is far less than that of the agglomerates formed by pure nanoparticles. Due to the smaller porosity, irregular shape, and relatively low cohesion, the fluidization behavior of core‐shell structure agglomerates is better than that of pure nanoparticle agglomerates. Abstract : Nanoparticles are difficult to be fluidized due to the existence of interparticle forces which lead to formation of plug, channeling, and agglomeration. The mechanism of formation and breakage of nanoparticle agglomerates and the advantageous effect of adding coarse fluid catalytic cracking particles on the fluidization performance of nanoparticles are investigated.