AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
TiO2 Nanoparticle Formation and Growth in ACVD Systems: Discrete Sectional Simulation
TANDEEP CHADHA, MengMeng Yang, Shuiqing Li, Pratim Biswas, Tsinghua University
Abstract Number: 383 Working Group: Nanoparticles and Materials Synthesis
Abstract Flame synthesis is one of the most widely used commercial scale techniques for the manufacture of nanoparticles. Many types of flames, such as diffusion, premixed and flat flames, are adopted in the synthesis apparatus, providing a suitable framework for nanoparticle formation and growth. In this study a comparison of these flames is made by a simulation study using a discrete sectional aerosol model. The temperature and velocity field in the different flame systems are obtained by simulation with COMSOL, and compared to each other. A discrete sectional model is used to predict particle formation and growth process in these flames. The differences of particle growth history of these flame systems are analyzed. The influences of flow rate and initial precursor concentration on the finial particle size distribution are discussed. An additional investigation of flame dilution and substrate effect is also provided. We end the study with the conclusion of features of different flames and how to choose proper operating factors to generate nanoparticles with desired properties.