Korean Journal of Chemical Engineering

, Volume 22, Issue 5, pp 697–704 | Cite as

Numerical simulation of the effects of the design feature of a cyclone and the inlet flow velocity on the separation of CO2 particles from a CO2-COF2 mixture

  • Younggeun Park
  • Chang Yeon Yun
  • Jongheop Yi
  • Honggon Kim


In synthesizing COF2 from CO, a considerable amount of CO2 is produced. A method of solidifying CO2 at low temperature and separating CO2 particles from the COF2 gas using a cyclone was designed and the separation efficiency according to the cyclone feature was studied. Optimal sizing and operation conditions of the cyclone were investigated by reviewing the flow velocity profile and the particle trajectory using a numerical analysis with computational fluid dynamics (CFD). The effects of the inlet flow velocity and the ratio of the cyclone diameter to the cone length (D/L) on the recovery efficiency were estimated. Results revealed that the separation efficiency increases with an increase in the ratio of D/L and a decrease in the cyclone size. The recovery efficiency of CO2 increases with the increase in the inlet flow velocity. Based on these results, we could propose a concept and methodology to design the optimal features and sizing of a cyclone suitable for separating solid CO2 from gaseous COF2 at low temperature.

Key words

Cyclone Computational Fluid Dynamics (CFD) Two-Phase Simulation Separation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Ashton, D. P. and Ryan, T. A.,Method for the Preparation ofCarbonyl Difluoride, European Patent 253,527 (1987);Carbonyl Difluoride Preparation, U.S. Patent 5,241,115 (1993).Google Scholar
  2. Bay, E. and Coates, M.,Production of Carbonyl Difluoride, European Patent 310,255 (1988).Google Scholar
  3. Bloor, M. L. G. and Iagham, D. B.,Theoretical Aspects of Hydrocyclone Flow, in: R. J. Wakeman (Ed.), Progress in Filtration and Separation Part III, Elsevier, Amsterdam (1983).Google Scholar
  4. Fayed, M. E. and Otten, L.,Handbook of Powder Science and Technology, Van Nostrand Reinhold Co., New York (1984).Google Scholar
  5. Franz, R.,Verfahren zur Herstellung von Carbonyl Difluoriden, German Patent DE 2823981 (1979).Google Scholar
  6. Henkes, R. A W. M., van der Flugt, F. F. and Hoogendoorn, C. J.,“Natural Convection Flow in a Square Cavity Calculated with Low-Reynolds-Number Turbulence Models,”Int. J. Heat Mass Transfer,34, 1543 (1991).CrossRefGoogle Scholar
  7. Hoffmann, A. C.,“An Experimental Investigation Elucidating the Nature of the Effect of Solids Loading on Cyclone Performance,”Filter. Sep.,28, 188(1991).CrossRefGoogle Scholar
  8. ie, M.,Method for Producing COF2, Japan Patent 313,016 (2003).Google Scholar
  9. Launder, B. E. and Spalding, D. B.,Lectures in Mathematical Models of Turbulence, Academic Press, London, England (1972).Google Scholar
  10. Mariana, S. K., Satake, T., Maezawa, A., Takeshita, T. and Uchida, S.,“Experimental and Modeling Study on CO2 Absorption in a Cyclone Scrubber by Phenomenological Model and Neural Networks,”Korean J. Chem.Eng.,21, 589 (2004).CrossRefGoogle Scholar
  11. Modde, M. and Mewes, D.,“Generation of Very Fine Solid Particles by Vapour Desublimation in a Gaseous Mixture,”J. Aerosol Sci. 26(1), S565 (1995).Google Scholar
  12. Mori, I. and Ohashi, M.,Method for Manufacturing Carbonyl Difluoride, Japan Patent 146,620 (2003); Japan Patent 221,214 (2003).Google Scholar
  13. Mori, I., Tomura, T., Kondo, T., Ohashi, M. and Kanashima, T.,Method for Manufacturing Carbonyl Difluoride, Japan Patent 267,712(2003).Google Scholar
  14. Morsi, S. A. and Alexander, A. J.,“An Investigation of Particle Trajectories in Two-Phase Flow Systems;”J. Fluid Mech.,55(2), 193 (1972).CrossRefGoogle Scholar
  15. Perry, R. H., Green, D. W. and Maloney, J. O.,Perry’s Chemical Engineers ’ Handbook, McGraw-Hill, 6th edition, New York (1984).Google Scholar
  16. Peskin, R L.,Turbulent Fluid—Particle Interaction, in: G. Hetsronil (Ed.),Handbook of Multiphase System, Hemisphere Publishing Corporation, Washington DC (1982).Google Scholar
  17. Takashima, M. and Yonezawa, S.,Production of Carbonyl Fluoride, Japan Patent 116,216 (1999).Google Scholar
  18. Tuzla, K. and Chen, J. C.,“Performance of a Cyclone under High Solid Loadings,”AIChE Symp. Ser.,88(289), 130 (1992).Google Scholar
  19. Webster, J. L.,Manufacture of Carbonyl Fluoride, PCT WO 96/19409 (1996);Manufacture of Carbonyl Fluoride, U.S. Patent 5,648,530 (1997);Process for the Preparation of Perfluorocarbons, U.S. Patent 5,744,657 (1998).Google Scholar
  20. Xiaodong, L., Jianhua, Y., Yuchun, C., Mingjiang, N. and Kefa, C.,“Numerical Simulation of the Effects ofTurbulence Intensity and Boundary Layer on Separation Efficiency in a Cyclone Separator,”Chemical Engineering Journal,95, 235 (2003).CrossRefGoogle Scholar
  21. Yang, K. W. and Yoshida, H.,“Effect of Mist Injection Position on Particle Separation Performance of Cyclone Scrubber,”Separation and Purification Technology, in press (2004).Google Scholar

Copyright information

© Korean Institute of Chemical Engineering 2005

Authors and Affiliations

  • Younggeun Park
    • 1
  • Chang Yeon Yun
    • 1
    • 2
  • Jongheop Yi
    • 1
    • 2
  • Honggon Kim
    • 1
    • 3
  1. 1.Samsung Electro MechanicsGyeonggiKorea
  2. 2.School of Chemical Engineering, Institute of Chemical ProcessesSeoul National UniversitySeoulKorea
  3. 3.Reaction Media Research CenterKorea Institute of Science and TechnologySeoulKorea

Personalised recommendations