Narrowing the size distribution of aerosol-made titania by surface growth and coagulation

Population Balance-Monte Carlo Simulation for Gas-to-Particle Synthesis of Nanoparticles

“…In addition to measurement errors, the discrepancy between PB-MC simulation results and experimental measurements may be due to: (1) the MC does not consider condensation and diffusional wall deposition (Park and Rogak 2003); (2) the inhomogeneity of temperature and concentration profiles is not considered, and the modeled temperature and gas velocity profiles deviate from experimental measurements; (3) the used kernel models (especially τ s ) may not be accurate for the case (Buesser et al 2011); (4) surface growth will narrow the size distribution in the initial stage, which is not included in this MC (Tsantilis and Pratsinis 2004).…”

“…All these models show significant discrepancy with experimental results, which was attributed to the effect of diffusional wall deposition, precursor reaction rate, condensation, and non-effective characteristic sintering time model. Tsantilis and Pratsinis (2004) found ranges of surface reaction rates lead to narrower size distribution. Nakaso et al (2003) studied the effect of chemical reaction rate on the size and morphology, and obtained an effective gas-phase reaction rate.…”

A bimodal moment model for the simulation of particle growth

“…The result of the moving sectional model by Spicer, Chaoul, Tsantilis, and Pratsinis (2002) and Tsantilis and Pratsinis (2004) are the references for evaluating the validity of the present bi-LN model. In this study, titania particle formation by gas-phase chemical reaction and growth by coagulation and surface reaction in a high temperature homogeneous reactor was considered.…”

“…The exponent m equals to 2 3 for the surface reaction considered in this study and k s is the surface reaction constant. Further details on the surface reaction kinetics are discussed in the paper of Tsantilis and Pratsinis (2004). Pratsinis' group showed that a process where surface growth was dominant resulted in narrower particle size distributions than those predicted by the self-preserving theory of coagulation (Spicer et al, 2002;Tsantilis & Pratsinis, 2004).…”

“…Further details on the surface reaction kinetics are discussed in the paper of Tsantilis and Pratsinis (2004). Pratsinis' group showed that a process where surface growth was dominant resulted in narrower particle size distributions than those predicted by the self-preserving theory of coagulation (Spicer et al, 2002;Tsantilis & Pratsinis, 2004). They investigated surface growth of titania particles from TiCl 4 and TTIP using the moving sectional model assuming spherical particles.…”