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Received December 6, 2004
Accepted May 25, 2005
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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
Samsung Electro Mechanics, #314 Maetan-3-dong, YeongTong-gu, Suwon City, Gyeonggi 442-743, Korea 1School of Chemical Engineering, Institute of Chemical Processes, Seoul National University, Shillim-dong, Kwanak-gu, Seoul 151-742, Korea 2Reaction Media Research Center, Korea Institute of Science and Technology, 39-1 Hawolgokdong, Seoul 136-791, Korea
hkim@kist.re.kr
Korean Journal of Chemical Engineering, September 2005, 22(5), 697-704(8), 10.1007/BF02705785
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Abstract
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.
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Fayed ME, Otten L, Handbook of Powder Science and Technology, Van Nostrand Reinhold Co., New York (1984)
Franz R, Verfahren zur Herstellung von Carbonyl Difluoriden, German Patent DE 2823981 (1979)
Henkes RAWM, vanderFlugt FF, Hoogendoom CJ, Int. J. Heat Mass Transf., 34, 1543 (1991)
Hoffmann AC, Filtr. Sep., 28, 188 (1991)
Irie M, Method for Producing COF2, Japan Patent 313,016 (2003)
Launder BE, Spalding DB, Lectures in Mathematical Models of Turbulence, Academic Press, London, England (1972)
Mariana, Sumida K, Satake T, Maezawa A, Takeshita T, Uchida S, Korean J. Chem. Eng., 21(3), 589 (2004)
Modde M, Mewes D, J. Aerosol Sci., 26(1), S565 (1995)
Mori I, Ohashi M, Method for Manufacturing Carbonyl Difluoride, Japan Patent 146,620 (2003)
Japan Patent 221,214 (2003)
Mori I, Tomura T, Kondo T, Ohashi M, Kanashima T, Method for Manufacturing Carbonyl Difluoride, Japan Patent 267,712 (2003)
Morsi SA, Alexander AJ, J. Fluid Mech., 55(2), 193 (1972)
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Takashima M, Yonezawa S, Production of Carbonyl Fluoride, Japan Patent 116,216 (1999)
Tuzla K, Chen JC, AIChE Symp. Ser., 88(289), 130 (1992)
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Manufacture of Carbonyl Fluoride, U.S. Patent 5,648,530 (1997)
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Li XD, Yan JH, Cao YC, Ni MJ, Kefa C, Chem. Eng. J., 95(1-3), 235 (2003)
Yang KW, Yoshida H, Sep. Purif. Technol. (2004)
