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Particle dynamics simulation of nanoparticle formation in a flame reactor using a polydispersed submicron-sized solid precursor

Widiyastuti, W. and Hidayat, Darmawan and Purwanto, Agus and Iskandar, Ferry and Okuyama, Kikuo (2010) Particle dynamics simulation of nanoparticle formation in a flame reactor using a polydispersed submicron-sized solid precursor. CHEMICAL ENGINEERING SCIENCE, 158 (2). ISSN 1385-8947

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Abstract

Formation of nanoparticles from polydispersed, non-spherical submicron-sized particles via a gas-phase route in a flame reactor was investigated using tungsten oxide particles as a model material. Nanoparticles were formed by the evaporation of non-spherical powder, followed by nucleation, coagulation and surface condensation. The effects of both the flame temperature profile and the carrier gas flow rate on particles formation were studied numerically, and the results were validated by experimental data. The simulation was initiated by the use of computational fluid dynamics (CFD) to obtain the temperature distribution in the flame reactor. Then, evaporation of the feed material was modeled, taking into account both the polydispersity and the shape of the non-spherical particles. A nodal method was selected to solve the general dynamics equation (GDE), which included nucleation, coagulation, and surface condensation terms, for the prediction of particle dynamics. Results of the simulation were consistent with the experimental data, indicating that the selected model adequately predicts the final particle size distribution. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:Article
Subjects:Material Science > Nanostructured materials
ID Code:9744
Deposited By:CSMNT
Deposited On:26 Oct 2010 14:05
Last Modified:26 Oct 2010 14:05

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