DOI QR코드

DOI QR Code

Holdup Characteristics of Small Bubbles in a Viscous Slurry Bubble Column

점성슬러리 기포탑에서 작은 기포의 체류량 특성

  • Jin, Hae-Ryong (School of Chemical Engineering, Chungnam National University) ;
  • Song, Yang-Ho (School of Chemical Engineering, Chungnam National University) ;
  • Kang, Yong (School of Chemical Engineering, Chungnam National University) ;
  • Jung, Heon (Synfuel Research Group, Korea Institute of Energy Research) ;
  • Lee, Ho-Tae (Synfuel Research Group, Korea Institute of Energy Research)
  • 진해룡 (충남대학교 화학공학과) ;
  • 송양호 (충남대학교 화학공학과) ;
  • 강용 (충남대학교 화학공학과) ;
  • 정헌 (한국에너지기술연구원) ;
  • 이호태 (한국에너지기술연구원)
  • Published : 2011.01.30

Abstract

Holdup characteristics of small bubbles were investigated in a viscous slurry bubble column. The phase holdup of small bubbles was obtained from the knowledge of total bubble(gas) holdup and large bubble holdup, which were measured by mean of static pressure drop method and dual resistivity probe method, respectively. Effects of gas velocity, viscosity of continuous liquid phase and solid fraction in the slurry phase on the small bubble holdup as well as holdups of total bubble(gas) and large bubble in a viscous slurry bubble column. The small bubble holdup increased with increasing gas velocity but decreased with increasing liquid viscosity or solid fraction in the slurry phase. In addition the fraction of small bubble in the total bubble(gas) holdup increased with increasing gas velocity but decreased with increasing liquid viscosity or solid fraction in the slurry phase. It was revealed that the rising velocity of large bubble did not related to the holdup of small bubble in a viscous slurry bubble column.

References

  1. Fan, L. S., Gas-Liquid-Solid Fluidization engineering, Butterworths, Boston(1989).
  2. Deckwer, W. D., Bubble Column Reactors, John wiley and sons, New York(1992).
  3. Kim, S. D. and Kang, Y., "Dispersed Phase Characteristics in Threephase Fluidized Beds," in Mixed-Flow Hydrodynamics(N. P. Cheremisinoffed.), Gulf Publishing Co.(1996).
  4. Kim, S. D. and Kang, Y., "Heat and Mass Transfer in Threephase Fluidized-Bed Reactors-An Overview," Chem. Eng. Sci., 52, 3639-3660(1997). https://doi.org/10.1016/S0009-2509(97)00269-8
  5. Kim, S. D. and Kang, Y., "Hydrodynamics, Heat and Mass Transfer in inverse and Circulating Three-Phase Fluidized-Bed Reactors for waste water Treatment," Studies Sur. Sci. Cat, 159, 103-108(2006). https://doi.org/10.1016/S0167-2991(06)81545-4
  6. Kang, Y., Lee, K. I., Shin, I. S., Son, S. M., Kim, S. D. and Jung, H., "Characterisics of Hydrodynamics, Heat and Mass Transfer in Three-phase Inverse Fluidized Beds," Korean Chem. Eng. Res. (HWAHAK KONGHAK), 46, 451-464(2008).
  7. Son, S. M., Shin, I. S., Kang, Y., Cho, Y. J. and Yang, H. C., "Characteristics of Heat Transfer in Three-phase Swirling Fluidized Beds," Korean Chem. Eng. Res.(HWAHAK KONGHAK), 36, 56-62(2008).
  8. Maretto, C. and Krishna, R., "Modelling of a Bubble Column Slurry Reactor for Fischer-Tropsch Synthesis," Catalysis Today, 52, 279-289(1999). https://doi.org/10.1016/S0920-5861(99)00082-6
  9. Krishna, R. and Sie, S. T., "Design and Scale-up of the Fischer-Tropsch Bubble Column Slurry Reactor," Fuel Processing Technol., 64, 73-105(2000). https://doi.org/10.1016/S0378-3820(99)00128-9
  10. Seo, M. J., Lim, D. H. Shin, I. S., Son, S. M. and Kang, Y., "Mass Transfer Characteristics in Pressurized Three-phase slurry Bubble Columns with Variation of Column Diameter," Korean Chem. Eng. Res.(HWAHAK KONGHAK), 47, 459-464(2009).
  11. Jang, J. H., Seo, M. J., Lim, D. H., Kang, Y., Jung, H. and Lee, H. T., "Heat Transfer Model and Energy Dissipation Rate in Bubble Columns with Continuous Operation," Korean Chem. Eng. Res.(HWAHAK KONGHAK), 47, 587-592(2009).
  12. Seo, M. J., Lim, D. H., Jin, H. R., Kang, Y., Jung, H. and Lee, H. T., "Analysis of Hydrodynamic Similarity of Pressurized Threephase Slurry Bubble Column for its Design and Scale-up," Korean Chem. Eng. Res.(HWAHAK KONGHAK), 47, 720-726(2009).
  13. Li, H. and Prakash, A., "Influence of Slurry Concentrations on Bubble population and Their Rise Velocities in a Three-phase Slurry Bubble Column," Power Technol., 113, 158-167(2000). https://doi.org/10.1016/S0032-5910(00)00228-X
  14. Kang, Y., Cho, Y. J., Woo, K. J. and Kim, S. D., "Daignosis of Bubble Distribution and Mass Transfer in Pressurized Bubble Columns with viscous Liquid Medium," Chem. Eng. Sci., 54, 4887-4893(1999). https://doi.org/10.1016/S0009-2509(99)00209-2
  15. Behkish, A., Lemoine, R., Schabiaque, L., Qukaci, R. and Morsi, B. L., "Gas Holdup and Bubble Size Behavior in a Large-Scale Slurry Bubble Column Reactor Operating with on Organic Liquid under Elevated Pressure and Temperature," Chem. Eng. J., 128, 69-84(2007). https://doi.org/10.1016/j.cej.2006.10.016

Cited by

  1. Size Verification of Small and Large Bubbles in a Bubble Column vol.50, pp.2, 2012, https://doi.org/10.9713/kcer.2012.50.2.304
  2. Holdup and Flow Behavior of Fluidized Solid Particles in a Liquid-Solid Circulating Fluidized Bed vol.52, pp.3, 2014, https://doi.org/10.9713/kcer.2014.52.3.371