CIRCULATION LIQUID VELOCITY IN EXTERNAL-LOOP AIRLIFT REACTORS

Choi KH

Korean Journal of Chemical Engineering, Vol.13, No.4, 379-383, July, 1996

In the tracer impulse method using only a conductivity probe, the more recommendable calculation method for the circulation liquid velocity was suggested, which decreased the errors resulted from the response time. The effects of the horizontal connection length (0.1≤L_c≤0.5 m), the cross-sectional area ratio of downcomer-to riser (0.11≤A_d/A_r≤ 0.53), and the superficial gas velocity (0.02≤U_G≤0.18 m s^-1) on the circulation liquid velocity were studied. The horizontal connection length as well as U_G and A_d/A_r had a significant effect on the circulation liquid velocity. The circulation liquid velocity increased with increasing L_c.

Keywords:Circulation Liquid Velocity;Airlift Reactor;Tracer Impulse Method;Conductivity Probe

[References]

Bello RA, "A Characterization Study of Airlift Contactors for Application to Fermentation," Ph.D. Thesis, University of Waterloo, Ontario, Canada (1981)
Bello RA, Robinson CW, Moo-Young M, Can. J. Chem. Eng., 62, 573 (1984)
Chakravarty M, Singh HD, Baruah JN, Iyengar MS, Ind. Eng. Chem., 16, 17 (1974)
Chisti MY, Moo-Young M, "Fermentation Technology, Bioprocessing, Scale-Up and Manufacture," biotechnology: The Science and the Business, Moses and Cape, eds., Harwood Academic Publisher, New York (1991)
Chisti MY, Halard B, Moo-Young M, Chem. Eng. Sci., 43, 451 (1988)
Chisti Y, Wenge F, Moo-Young M, Chem. Eng. J., 57, B7 (1995)
Choi KH, Lee WK, J. Chem. Technol. Biotechnol., 56, 51 (1993)
Choi KH, Chisti Y, Mooyoung M, J. Chem. Technol. Biotechnol., 62(4), 327 (1995)
Fan LS, Hwang SJ, Matsuura A, Chem. Eng. Sci., 39, 1677 (1984)
Fields PS, Mitchell FRG, Slater NKH, Chem. Eng. Commun., 25, 93 (1984)
Herskowitz M, Merchuk JC, Can. J. Chem. Eng., 64, 57 (1986)
Hiyahara T, Hamaguchi M, Sukeda Y, Takahashi T, Can. J. Chem. Eng., 64, 718 (1986)
Kemblowski Z, Przywarski J, Diab A, Chem. Eng. Sci., 23, 4023 (1993)
Jones AG, Chem. Eng. Sci., 40, 449 (1985)
Jose MS, Merchuk JC, Can. J. Chem. Eng., 69, 465 (1991)
Li GQ, Yang SZ, Cai ZL, Chen JY, Chem. Eng. J., 56, B101 (1995)
Lippert J, Adler I, Meyer HD, Lubbert A, Biotechnol. Bioeng., 25, 437 (1983)
Livingston AG, Zang SF, Chem. Eng. Sci., 48, 1641 (1993)
Lu WJ, Hwang SJ, Chang CM, Chem. Eng. Sci., 50(8), 1301 (1995)
Mercer DG, Biotechnol. Bioeng., 23, 2421 (1981)
Merchuk JC, Stein Y, AIChE J., 27, 377 (1981)
Merchuk JC, Chem. Eng. Sci., 41, 11 (1986)
Popovic M, Robinson CW, Biotechnol. Bioeng., 32, 301 (1988)
Popovic M, Robinson CW, Chem. Eng. Sci., 42, 2811 (1987)
Shamlou PA, Pollard DJ, Ison AP, Lilly MD, Chem. Eng. Sci., 49(3), 303 (1994)
Siegel MH, Merchuk JC, Schugerl K, AIChE J., 32, 1585 (1986)
Verlaan P, Tramper J, Riet KV, Chem. Eng. J., 33, B43 (1986)
Wachi S, Jones AG, Elson TP, Chem. Eng. Sci., 46, 657 (1991)
Weiland P, Ger. Chem. Eng., 7, 374 (1984)

[Referenced By]

[1] Bello RA, "A Characterization Study of Airlift Contactors for Application to Fermentation," Ph.D. Thesis, University of Waterloo, Ontario, Canada (1981)

[2] Bello RA, Robinson CW, Moo-Young M, Can. J. Chem. Eng., 62, 573 (1984)

[3] Chakravarty M, Singh HD, Baruah JN, Iyengar MS, Ind. Eng. Chem., 16, 17 (1974)

[4] Chisti MY, Moo-Young M, "Fermentation Technology, Bioprocessing, Scale-Up and Manufacture," biotechnology: The Science and the Business, Moses and Cape, eds., Harwood Academic Publisher, New York (1991)

[5] Chisti MY, Halard B, Moo-Young M, Chem. Eng. Sci., 43, 451 (1988)

[6] Chisti Y, Wenge F, Moo-Young M, Chem. Eng. J., 57, B7 (1995)

[7] Choi KH, Lee WK, J. Chem. Technol. Biotechnol., 56, 51 (1993)

[8] Choi KH, Chisti Y, Mooyoung M, J. Chem. Technol. Biotechnol., 62(4), 327 (1995)

[9] Fan LS, Hwang SJ, Matsuura A, Chem. Eng. Sci., 39, 1677 (1984)

[10] Fields PS, Mitchell FRG, Slater NKH, Chem. Eng. Commun., 25, 93 (1984)

[11] Herskowitz M, Merchuk JC, Can. J. Chem. Eng., 64, 57 (1986)

[12] Hiyahara T, Hamaguchi M, Sukeda Y, Takahashi T, Can. J. Chem. Eng., 64, 718 (1986)

[13] Kemblowski Z, Przywarski J, Diab A, Chem. Eng. Sci., 23, 4023 (1993)

[14] Jones AG, Chem. Eng. Sci., 40, 449 (1985)

[15] Jose MS, Merchuk JC, Can. J. Chem. Eng., 69, 465 (1991)

[16] Li GQ, Yang SZ, Cai ZL, Chen JY, Chem. Eng. J., 56, B101 (1995)

[17] Lippert J, Adler I, Meyer HD, Lubbert A, Biotechnol. Bioeng., 25, 437 (1983)

[18] Livingston AG, Zang SF, Chem. Eng. Sci., 48, 1641 (1993)

[19] Lu WJ, Hwang SJ, Chang CM, Chem. Eng. Sci., 50(8), 1301 (1995)

[20] Mercer DG, Biotechnol. Bioeng., 23, 2421 (1981)

[21] Merchuk JC, Stein Y, AIChE J., 27, 377 (1981)

[22] Merchuk JC, Chem. Eng. Sci., 41, 11 (1986)

[23] Popovic M, Robinson CW, Biotechnol. Bioeng., 32, 301 (1988)

[24] Popovic M, Robinson CW, Chem. Eng. Sci., 42, 2811 (1987)

[25] Shamlou PA, Pollard DJ, Ison AP, Lilly MD, Chem. Eng. Sci., 49(3), 303 (1994)

[26] Siegel MH, Merchuk JC, Schugerl K, AIChE J., 32, 1585 (1986)

[27] Verlaan P, Tramper J, Riet KV, Chem. Eng. J., 33, B43 (1986)

[28] Wachi S, Jones AG, Elson TP, Chem. Eng. Sci., 46, 657 (1991)

[29] Weiland P, Ger. Chem. Eng., 7, 374 (1984)