Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12323
Title: Effect of precursor loading on non-spherical TiO2 nanoparticle synthesis in a diffusion flame reactor
Authors: Yu, MZ
Lin, JZ
Chan, TL 
Keywords: Coagulation
Inlet precursor loading
Numerical simulation
Sintering
TiO2 nanoparticle synthesis
Issue Date: 2008
Publisher: Pergamon Press
Source: Chemical engineering science, 2008, v. 63, no. 9, p. 2317-2329 How to cite?
Journal: Chemical engineering science 
Abstract: A numerical method of combining computational fluid dynamics with the particle kinetics theory is developed to study the effect of precursor loading on non-spherical TiO2 nanoparticle synthesis in a diffusion flame reactor. A one-step chemical kinetics approach is employed to model precursor TiCl4 oxidation that leads to particle formation. An efficient quadrature method of moments (QMOM) and the combustion model based on the eddy dissipation concept (EDC) together with k - ε{lunate} turbulence model are used to approximate the particle kinetics evolution and the flame fields, respectively. Excellent agreements between the predicted and experimental data, with respect to the flame temperature distribution and particle kinetics, are obtained. For the final product of nanoparticles in the same flame field, the results show that the increasing of precursor loading leads to the larger agglomerated particles with larger size distribution. The primary particle number and size per agglomerate also increases with increasing the precursor loading, while the total specific surface area (SSA) decreases. The variation of inlet precursor loading has a negligible effect on the particle surface fractal dimension if only the variable of precursor loading is considered. As the inlet precursor loading is fixed, the increasing of carrying gas rate leads to the smaller agglomerated particles with increasing of total SSA and width of particle size distribution.
URI: http://hdl.handle.net/10397/12323
ISSN: 0009-2509
DOI: 10.1016/j.ces.2007.11.008
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