화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.34, No.7, 2485-2492, 1995
Particle-Liquid Mass-Transfer in 3-Phase Mechanically Agitated Contactors - Power-Law Fluids
A systematic study of particle-liquid mass transfer coefficients in three-phase mechanically agitated contactors using non-Newtonian power law liquids is reported using the well-known physical dissolution technique. The system used is benzoic acid/aqueous (carboxymethyl)cellulose solutions/air. A wide range of variables covering particle size, air flow rate, impeller type, and theological characteristics has been employed. The results indicated a unique relationship between the particle-liquid mass transfer coefficient and the critical impeller speed for a solid suspension under aerated conditions. A conservative correlation for the particle-liquid mass transfer coefficient which makes allowance for the theological complexity of the system is proposed.