Mass Transfer Characteristics in Pressurized Three-phase Slurry Bubble Columns with Variation of Column Diameter

가압 삼상슬러리 기포탑에서 직경변화에 따른 기체-액체 물질전달 특성

  • Seo, Myung Jae (School of Chemical Engineering, Chungnam National University) ;
  • Lim, Dae Ho (School of Chemical Engineering, Chungnam National University) ;
  • Shin, Ik Sang (School of Chemical Engineering, Chungnam National University) ;
  • Son, Sung Mo (School of Chemical Engineering, Chungnam National University) ;
  • Kang, Yong (School of Chemical Engineering, Chungnam National University)
  • 서명재 (충남대학교 화학공학과) ;
  • 임대호 (충남대학교 화학공학과) ;
  • 신익상 (충남대학교 화학공학과) ;
  • 손성모 (충남대학교 화학공학과) ;
  • 강용 (충남대학교 화학공학과)
  • Received : 2009.04.20
  • Accepted : 2009.05.11
  • Published : 2009.08.31

Abstract

Gas-liquid mass transfer characteristics were investigated in pressurized three-phase slurry bubble columns with variation of column diameter. Effects of gas velocity, operating pressure, liquid viscosity, solid content in the slurry phase and column diameter on the gas-liquid volumetric mass transfer coefficient($k_La$) were determined. The effects of operating variables on the mass transfer coefficient tended to change with variation of column diameter. The mass transfer coefficient increased with increasing gas velocity or operating pressure but decreased with increasing column diameter, liquid viscosity or solid concentration in the slurry phase. The increase trend of $k_La$ value with increasing gas velocity and the decrease trend of $k_La$ value with increasing liquid viscosity, tended to decrease gradually with increasing column diameter. However, the effects of operating pressure and solid concentration in the slurry phase on the $k_La$ value did not change considerably with variation of column diameter. The values of $k_La$ were well correlated with operating variables with in this experimental conditions as $k_La=0.02D^{-0.26}U_G^{0.28}P^{0.43}{\mu}_L^{-0.04}S_c^{-0.35}$.

Acknowledgement

Supported by : 한국에너지기술연구원

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