Back
 ACES  Vol.4 No.4 , October 2014
Bubble and Heat Transfer Phenomena in Viscous Slurry Bubble Column
Abstract: Heat transfer and bubble phenomena were investigated by adopting the drift flux model in a viscous slurry bubble column reactor (SBCR), having a diameter of 0.0508 m(ID) and height 1.5 m. The effects of superficial gas velocity (0.002 -0.164 m/s), solid concentration (0 - 20 wt%) and liquid viscosity (paraffin oil; 16.9 mPa•s and squalane; 25.9 mPa•s) on the gas holdup and heat transfer characteristics were examined. It was observed that the gas holdup increased with increasing superficial gas velocity (UG), but decreased with increasing solid concentration (SC) or slurry viscosity. The degree of non-uniformity in a SBCR could be determined by the modified drift flux model at the heterogeneous flow regime. The local heat transfer coefficient (h) between the immersed heater and the bed decreased with increasing liquid viscosity and SC, but it increased with increasing UG. The modified Nusselt number including the gas holdup and local heat transfer coefficient was well correlated in terms of dimensionless groups such as Reynolds and Prandtl numbers.
Cite this paper: Kim, H. , Kim, J. , Lee, C. , Kang, S. , Woo, K. , Jung, H. and Kim, D. (2014) Bubble and Heat Transfer Phenomena in Viscous Slurry Bubble Column. Advances in Chemical Engineering and Science, 4, 417-429. doi: 10.4236/aces.2014.44046.
References

[1]   Krishna, R. and Sie, S.T. (2000) Design and Scale-Up of the Fischer-ropsch Bubble Column Slurry Reactor. Fuel Processing Technology, 64, 73. http://dx.doi.org/10.1016/S0378-3820(99)00128-9

[2]   Zhang, K., Song, H.S. and Sun, D.K. (2003) Low-Temperature Methanol Synthesis in a Circulating Slurry Bubble Reactor. Fuel, 82, 233. http://dx.doi.org/10.1016/S0016-2361(02)00221-1

[3]   Clerici, G.C.E. and Belmonte, G. (2006) Hydrocarbons from Synthesis Gas in Slurry Reactors and for the Separation of the Liquid Phase Produced from the Solid Phase. US Patent 7,144,924.

[4]   Inga, J.R. and Morsi, B.I. (1999) Effect of Operating Variables on the Gas Holdup in a Large-Scale Slurry Bubble Column Reactor Operating with an Organic Liquid Mixture. Industrial Engineering Chemistry Research, 38, 928. http://dx.doi.org/10.1021/ie980384q

[5]   Yang, G.Q., Luo, X., Lau, R. and Fan, L.S. (2000) Heat-Transfer Characteristics in Slurry Bubble Columns at Elevated Pressures and Temperatures. Industrial Engineering Chemistry Research, 39, 2568. http://dx.doi.org/10.1021/ie990774s

[6]   Li, H., Prakash, A., Margaritis, A. and Bergougnou, M.A. (2003) Effects of Micron-Sized Particles on Hydrodynamics and Local Heat Transfer in a Slurry Bubble Column. Powder Technology, 133, 171.
http://dx.doi.org/10.1016/S0032-5910(03)00118-9

[7]   Deckwer, W.D. (1992) Bubble Column Reactors. Wiley, Chichester, 399.

[8]   Koide, K., Takazawa, A., Komura, M. and Matsunaga, H. (1984) Gas Holdup and Volumetric Liquid-Phase Mass Transfer Coefficient in Solid-Suspended Bubble Columns. Journal of Chemical Engineering of Japan, 17, 459. http://dx.doi.org/10.1252/jcej.17.459

[9]   Saxena, S.C., Rao, N.S. and Saxena, A.C. (1990) Heat-Transfer and Gas-Holdup Studies in a Bubble Column: Air-Water-Glass Bead System. Chemical Engineering Communications, 96, 31.
http://dx.doi.org/10.1080/00986449008911481

[10]   Fan, L.S. (1989) Gas-Liquid-Solid Fluidization Engineering. Butterworths, Boston.

[11]   Kara, S., Kelkar, B.G., Shah, Y.T. and Carr, N.L. (1982) Hydrodynamics and Axial Mixing in a Three-Phase Bubble Column. Industrial & Engineering Chemistry Process Design and Development, 21, 584-594. http://dx.doi.org/10.1021/i200019a009

[12]   Wallis, G.B. (1969) One-Dimensional Two-Phase Flow. McGraw-Hill, New York, 243.

[13]   Thorat, B.N. and Joshi, J.B. (2004) Regime Transition in Bubble Columns: Experimental and Predictions. Experimental Thermal and Fluid Science, 28, 423-430.
http://dx.doi.org/10.1016/j.expthermflusci.2003.06.002

[14]   Zuber, N. and Findlay, J.A. (1965) Average Volumetric Concentration in Two-Phase Flow Systems. Journal of Heat Transfer, 87, 453-468. http://dx.doi.org/10.1115/1.3689137

[15]   Xie, T., Ghiaasiaan, S.M., Karrila, S. and McDonough, T. (2003) Flow Regimes and Gas Holdup in Paper Pulp-Water-Gas Three-Phase Slurry Flow. Chemical Engineering Science, 58, 1417-1430.
http://dx.doi.org/10.1016/S0009-2509(02)00660-7

[16]   Ruzicka, M.C., Zahradnik, J., Drahos, J. and Thomas, N.H. (2001) Homogeneous-Heterogeneous Regime Transition in Bubble Columns. Chemical Engineering Science, 56, 4609-4626.
http://dx.doi.org/10.1016/S0009-2509(01)00116-6

[17]   Tang, C.Z. and Heindel, T.J. (2006) A Gas Holdup Model for Cocurrent Air-Water-Fiber Bubble Columns. Chemical Engineering Science, 61, 3299-3312. http://dx.doi.org/10.1016/j.ces.2005.12.011

[18]   Hol, P.D. and Heindel, T.J. (2005) Local Gas Holdup Variation in a Fiber Slurry. Industrial Engineering Chemistry Research, 44, 4778-4784. http://dx.doi.org/10.1021/ie050041+

[19]   Cho, Y.J., Song, P.S., Kim, S.H., Kang, Y. and Kim, S.D. (2001) Journal of Chemical Engineering of Japan, 34, 254-261. http://dx.doi.org/10.1252/jcej.34.254

[20]   Drahos, J., Zahradnik, J., Bradka, F. and Puncochar, M. (1992) Fractal Behaviour of Pressure Fluctuations in a Bubble Column. Chemical Engineering Science, 47, 4069-4075.
http://dx.doi.org/10.1016/0009-2509(92)85158-8

[21]   Deckwer, W.D., Louisi, Y., Zaidi, A. and Ralek, M. (1980) Hydrodynamic Properties of the Fischer-Tropsch Slurry Process. Industrial & Engineering Chemistry Process Design and Development, 19, 699-708. http://dx.doi.org/10.1021/i260076a032

[22]   Shah, Y.T., Kelkar, B.G., Godbole, S.P. and Deckwer, W.D. (1982) Design Parameters Estimations for Bubble Column Reactors. AIChE Journal, 28, 353-379. http://dx.doi.org/10.1002/aic.690280302

[23]   Crabtree, J.R. and Bridgwater, J. (1971) Bubble Coalescence in Viscous Liquids. Chemical Engineering Science, 26, 839-851. http://dx.doi.org/10.1016/0009-2509(71)83045-2

[24]   Bakshi, B.R., Zhong, H., Jiang, P. and Fan, L.-S. (1996) Analysis of Flow in Gas-Liquid Bubble Columns Using Multi-Resolution Methods. Transactions of the American Institute of Chemical Engineers, 73, 608-614.

[25]   Letzel, H.M., Schouten, J.C., Krishna, R. and Van den Bleek, C.M. (1997) Characterization of Regimes and Regime Transitions in Bubble Columns by Chaos Analysis of Pressure Signals. Chemical Engineering Science, 52, 4447-4459. http://dx.doi.org/10.1016/S0009-2509(97)00290-X

[26]   Kang, S.H., Son, S.M., Kang, Y., Bae, J.W. and Jun, K.W. (2008) Effects of Pressure Fluctuations on the Heat Transfer Characteristics in a Pressurized Slurry Bubble Column. Korean Journal of Chemical Engineering, 25, 897-904. http://dx.doi.org/10.1007/s11814-008-0148-5

[27]   Fan, L.S., Yang, G.Q., Lee, D.J., Tsuchiya, K. and Luo, X. (1999) Some Aspects of High-Pressure Phenomena of Bubbles in Liquids and Liquid-Solid Suspensions. Chemical Engineering Science, 54, 4681-4709. http://dx.doi.org/10.1016/S0009-2509(99)00348-6

[28]   Reilly, I.G., Scott, D.S., de Bruijn, T.J.W., Jain, A. and Piskorz, J. (1986) A Correlation for Gas Holdup in Turbulent Coalescing Bubble Columns. The Canadian Journal of Chemical Engineering, 64, 705-717. http://dx.doi.org/10.1002/cjce.5450640501

[29]   Sauer, T. and Hempel, D.C. (1987) Fluid Dynamics and Mass Transfer in a Bubble Column with Suspended Particles. Chemical Engineering & Technology, 10, 180-189.
http://dx.doi.org/10.1002/ceat.270100123

[30]   Schumpe, A., Saxena, A.K. and Fang, L.K. (1987) Gas/Liquid Mass Transfer in a Slurry Bubble Column. Chemical Engineering Science, 42, 1787-1796. http://dx.doi.org/10.1016/0009-2509(87)80183-5

[31]   Lin, T.J. and Fan, L.S. (1999) Heat Transfer and Bubble Characteristics from a Nozzle in High-Pressure Bubble Columns. Chemical Engineering Science, 54, 4853-4859. http://dx.doi.org/10.1016/S0009-2509(99)00205-5

[32]   Kim, S.D. and Kang, Y. (1997) Heat and Mass Transfer in Three-Phase Fluidized-Bed Reactors—An Overview. Chemical Engineering Science, 52, 3639-3660.
http://dx.doi.org/10.1016/S0009-2509(97)00269-8

[33]   Müller, K. (1958) Heat Transfer in Viscous Suspensions in Bubble Columns. Dissertation, Technical University of Berlin, Berlin.

[34]   Deckwer, W.D. (1992) Bubble Column Reactors. Wiley, Chichester, 270.

 
 
Top