(350d) Numerical Study of Particle Dynamics during Flame Spray Synthesis of Nanoparticles
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Particle Technology Forum
Poster Session: Particle Technology Forum
Wednesday, November 18, 2020 - 8:00am to 9:00am
In the present study, modelling of particle dynamics during FSP is performed assuming that there is no surface growth. Monomers are formed by instantaneous chemical reactions and grow to clusters and particles due to collisions. As FSP is a complex process, mainly because of formation and growth of particles by agglomeration/aggregation and sintering, a bivariate population balance equation is solved by the quadrature method of moments (QMOM) that better describes the particle population [3]. This approach takes into consideration polydispersity of the produced particles. Particle number concentration, sintering rate and residence time of nanoparticles are calculated and the obtained results are compared with results from the monodisperse model of Kruis et al. [4], which describes the size distribution by its mean value. The obtained size values are compared with experimental data by nitrogen adsorption measurements. Coupling the control of growth processes with accurate characterization tools and modelling approaches is prerequisite for process scale-up and consequently development of high-performance materials.
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