Skip to main content
Log in

Modeling of the monomer role and the coalescence limitation in primary particle growth

  • Published:
Korean Journal of Chemical Engineering Aims and scope Submit manuscript

Abstract

The general dynamic equation (GDE) has been numerically solved to simulate the growth of ultrafine particles (UFPs) in a tubular aerosol reactor, approximating the particle size distribution by a lognormal function. The GDE includes all the terms describing diffusion, thermophoresis, nucleation, condensation and coagulation. We have also considered the efficiency of liquid-like coagulation to primary particles. The data calculated from our model were compared with those from the previous model and also with some experimental results from a TiO2 UFP generator. The condensation term, which we split from a single coagulation term in the previous model, well described the monomer contribution to the particle growth. Introduction of one adjustable parameter, the efficiency of coagulation, was successful in limiting the growth of primary particles and fit the experimental data.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Akhtar, M. K, Xiong, Y. and Pratsinis, S. E., “Vapor Synthesis of Titania Powder by Titanium Tetrachloride Oxidation”,AJChE,37, 1561 (1991).

    CAS  Google Scholar 

  • Brock, J. R., “Simulation of Aerosol Dynamics”, in Theory of Dispersed Multiflow, Mayer, R. E., ed., Academic Press, New York (1983).

    Google Scholar 

  • Han, Y. S., “Preparation of Ultrafine TiO2 and TiO2/SiO2 Composite Particles by Vapor-Phase Hydrolysis”, M.S. Thesis, Chung Ang University (1996).

  • Hinds W. C, “Aerosol Technology” John-Wiley & Sons, New York (1983).

    Google Scholar 

  • Jang, H. D., Lim, Y. W., Jeong J., Kang, T. W. and Shim, G., ”Production of Ultrafine Metal Oxide Powder”, KIGAM Research Report, KR-95© 2–6 (1995).

  • Kim, S. G. and Brock, J. R., “Growth of Ferromagnetic Particles from Cation Reduction by Borohydride Ions”,J. Colloid & Interf. Sci.,116, 431 (1987).

    Article  CAS  Google Scholar 

  • Landgrebe, J.D. and Pratsinis, S.E., “Discrete Sectional Model for Paniculate Production by Gas-Phase Chemical Reaction and Aerosol Coagulation in the Free-Molecular Regime”,J. Colloid & Interf. Sci.,139, 63 (1990).

    Article  CAS  Google Scholar 

  • Lee, K.W., Chen, H. and Gieseke, J.A, “Log-Normally Preserving Size Distribution for Brownian Coagulation in the Free-Molecular Regime”Aerosol Sci.Technol,3, 53 (1984).

    Article  CAS  Google Scholar 

  • Pratsinis, S. E. and Kim, K. S., “Particle Coagulation, Diffusion and Thermophoresis in Laminar Tube Flows”,J. Aerosol Sci.,20, 101 (1989).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Sun-Geon Kim.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Han, YS., Lee, KM., Kim, SG. et al. Modeling of the monomer role and the coalescence limitation in primary particle growth. Korean J. Chem. Eng. 16, 104–110 (1999). https://doi.org/10.1007/BF02699012

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02699012

Key words

Navigation