Hydrodynamic Characteristics of a FCC Regenerator

Won Namkung; Sung Won Kim; Sang Done Kim

Korean Journal of Chemical Engineering, Vol.20, No.1, 110-115, January, 2003

DOI10.1007/BF02697194 Export Citation

Hydrodynamic Characteristics of a FCC Regenerator

Won Namkung^{1, 2}, Sung Won Kim¹, and Sang Done Kim^{1, †}

¹Department of Chemical and Biomolecular Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
²Smelting Reduction Research Team, RIST, Pohang 790-600, Korea

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The hydrodynamic and gas mixing characteristics have been determined in a FCC regenerator (0.48 m I.D.×3.4 m high) with FCC particles. Solids holdup in the dense bed decreases with increasing gas velocity, but it increases in the freeboard region. The bubble/void fraction increases with an increase along the bed height at a given gas velocity and increases with increasing gas velocity at a constant bed height. Backmixed tracer gas at the wall region is higher than that at the center region of the bed. The gas backmixing coefficient decreases with increasing gas velocity.

Keywords:FCC Regenerator;Bubble/Void;Gas Mixing

[References]

Bendat JS, Piersol AG, "Random Data, Analysis and Measurement Procedures," John Wiley & Sons, New York, 361 (1986)
Cankurt NT, Yerushalmi J, "Gas Backmixing in High Velocity Fluidized Beds," Fluidization, Davidson, J.F. and Kearins, D.L, eds., Cambridge Univ. Press, London, 387 (1978)
Choi YT, Kim SD, J. Chem. Eng. Jpn., 24, 195 (1991)
Clift R, Grace JR, "Fluidization," Davidson, J.F., Harrison, D. and Clift, R., Eds., Academic Press Inc., London, 73 (1985)
Farag HI, Ege PE, Grislingas A, Delasa HI, Can. J. Chem. Eng., 75(5), 851 (1997)
Kim SW, Namkung W, Kim SD, "Bubble/void Properties in a FCC Regenerator," Proc. 6th Asian Conf. on Fluidized-bed and Three-phase Reactors, eds. by H.S. Chun and S.D. Kim, Cheju, Korea, 43 (1998)
Kim SW, Namkung W, Kim SD, J. Chem. Eng. Jpn., 33(1), 78 (2000)
Lee GS, Kim SD, Chem. Eng. Commun., 86, 91 (1989)
Lee GS, Kim SD, Korean J. Chem. Eng., 8(1), 6 (1991)
Namkung W, Kim SD, Powder Technol., 99(1), 70 (1998)
Namkung W, Kim SD, HWAHAK KONGHAK, 36(5), 797 (1998)
Namkung W, Kim SD, Korean J. Chem. Eng., 16(4), 456 (1999)
Namkung W, Kim SW, Kim SD, HWAHAK KONGHAK, 38(4), 523 (2000)
Senior RC, Avidan AA, "Comparison of the Performance of Circulating and Turbulent Bed FCC REgenerators," Proc. of 5th Int. Conf. on Circulating Fluidized Bed, Beijing, China (1996)
Wilson JW, "Fluid Catalytic Cracking-Technology and Operation," Penn Well Publishing Company, Oklahoma, U.S.A. (1997)

[Related Articles]

[1] Bendat JS, Piersol AG, "Random Data, Analysis and Measurement Procedures," John Wiley & Sons, New York, 361 (1986)

[2] Cankurt NT, Yerushalmi J, "Gas Backmixing in High Velocity Fluidized Beds," Fluidization, Davidson, J.F. and Kearins, D.L, eds., Cambridge Univ. Press, London, 387 (1978)

[3] Choi YT, Kim SD, J. Chem. Eng. Jpn., 24, 195 (1991)

[4] Clift R, Grace JR, "Fluidization," Davidson, J.F., Harrison, D. and Clift, R., Eds., Academic Press Inc., London, 73 (1985)

[5] Farag HI, Ege PE, Grislingas A, Delasa HI, Can. J. Chem. Eng., 75(5), 851 (1997)

[6] Kim SW, Namkung W, Kim SD, "Bubble/void Properties in a FCC Regenerator," Proc. 6th Asian Conf. on Fluidized-bed and Three-phase Reactors, eds. by H.S. Chun and S.D. Kim, Cheju, Korea, 43 (1998)

[7] Kim SW, Namkung W, Kim SD, J. Chem. Eng. Jpn., 33(1), 78 (2000)

[8] Lee GS, Kim SD, Chem. Eng. Commun., 86, 91 (1989)

[9] Lee GS, Kim SD, Korean J. Chem. Eng., 8(1), 6 (1991)

[10] Namkung W, Kim SD, Powder Technol., 99(1), 70 (1998)

[11] Namkung W, Kim SD, HWAHAK KONGHAK, 36(5), 797 (1998)

[12] Namkung W, Kim SD, Korean J. Chem. Eng., 16(4), 456 (1999)

[13] Namkung W, Kim SW, Kim SD, HWAHAK KONGHAK, 38(4), 523 (2000)

[14] Senior RC, Avidan AA, "Comparison of the Performance of Circulating and Turbulent Bed FCC REgenerators," Proc. of 5th Int. Conf. on Circulating Fluidized Bed, Beijing, China (1996)

[15] Wilson JW, "Fluid Catalytic Cracking-Technology and Operation," Penn Well Publishing Company, Oklahoma, U.S.A. (1997)