Abstract
iquid phase RTD curves were investigated in classical fixed and fluidized bed regimes with high density particles. The effect of liquid velocity was studied on bed hydrodynamics. Using an impulse tracer injection technique in a column of 5 cm inner diameter and 1.2 m height, liquid RTD, mean residence time (MRT), axial dispersion coefficient (ADC) and vessel dispersion number (N D ) were determined. ADC increases with liquid superficial velocity. It varied from 4.63 to 20.7 cm2/s for the particle Reynolds number of 43 to 279, respectively. The experimental results show that the hight density particles cause less ADC than the low density particles at an identical Reynolds number.
Similar content being viewed by others
References
B.G. M. van Wachem and A. E. Almstedt, Chem. Eng. J., 96, 81 (2003).
M. Aghajani, H. Müller-Steinhagen and M. Jamialahmadi, Int. J. Heat Mass Transfer, 48, 317 (2005).
S. Limtrakul, J. Chen, P. A. Ramachandran and M. P. Dudukoviæ, Chem. Eng. Sci., 60, 1889 (2005).
D. H. Lee, Korean J. Chem. Eng., 18, 347 (2001).
G. Jin and D. Liu, Powder Technol., 154, 138 (2005).
T. Renganathan and K. Krishnaiah, Chem. Eng. J., 98, 213 (2004).
M. Asif, N. Kalogerakis and L. Behie, Chem. Eng. Sci., 47, 4155 (1992).
W. T. Tang and L. S. Fan, Chem. Eng. Sci., 45, 543 (1990).
S. F. Chung and C. Y. Wen, AIChE J., 14, 857 (1968).
K. I. Kikuchi, H. Konno, S. Kakutani, T. Sugawara and H. Ohashi, J. Chem. Eng. Japan., 19, 362 (1984).
W. T. Tang and L. S. Fan, AIChE J., 35, 355 (1989).
O. Levenspiel, Chem. React. Eng., 3rd Ed., John Wiley & Sons, New York, 668 (1999).
O. Levenspiel and W. K. Smith, Chem. Eng. Sci., 6, 227 (1957).
D. Kunii and O. Levenspiel, Fluidization Eng., 2nd Ed., Butterworth-Heinemann, Boston, 491 (1991).
V. L. Streeter, E. B. Wylie and K.W. Bedford, Fluid mechanics, 9th Ed. McGraw-Hill, New York, 740 (1998).
E. van Zessen, Hydrodynamics of liquid-liquid-solid fluidized bed bioreactor, Ph.D Thesis, Wageningen University, Netherland, 200 (2003).
H. M. Jena, G.K. Roy and B. C. Meikap, Powder Technol., 196, 246 (2009).
S. J. Kim, S.Y. Jeung and H. Moon, Korean J. Chem. Eng., 15, 637 (1998).
J. F. Richardson and W. N. Zaki, Trans. Inst. Chem. Eng., 32, 35 (1954).
H. I. Cho, C. H. Chung, G.Y. Han, G. R. Ahn and J. S. Kong, Korean J. Chem. Eng., 17, 292 (2000).
J. Kim, G. Han and C. Yi, Korean J. Chem. Eng., 19, 491 (2002).
P. R. Krishnaswamy and L.W. Shemilt, Can. J. Chem. Eng., 51, 680 (1973).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Behin, J., Shojaeimehr, T. Influence of high density particles in reduction of axial dispersion in liquid fluidized bed with residence time distribution curve studies. Korean J. Chem. Eng. 28, 980–986 (2011). https://doi.org/10.1007/s11814-010-0451-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-010-0451-9