New Correlations of Volumetric Liquid-Phase Mass Transfer Coefficients in Gas-Inducing Agitated Tank Reactors

作者：Yu Hesheng; Tan Zhongchao^*

来源：International Journal of Chemical Reactor Engineering, 2012, 10(1): A50.

DOI：10.1515/1542-6580.3049

• volumetric liquid-phase mass transfer coefficient
• gas-inducing impeller
• agitated tank

Volumetric liquid-phase mass transfer coefficient (kLa) is one of the most important parameters for the evaluation of the performance of a gas-inducing agitated tank (GIAT). In this paper, two equations in terms of power input per unit liquid volume (P/VL) and relative gas dispersion parameter (NI/Ncd), respectively, are developed according to data in literature. They can correlate existing kLa values within +/-20% of measured ones for bladed impellers with different impeller submergence to tank diameter ratios in the range of 0.5 -1.23. In order to validate these equations, the liquid phase mass transfer coefficients in a continuous GIAT equipped with a 4-blade straight impeller were measured by removal of oxygen from water. It was found that the equation in P/VL criterion could correlate kLa values within +/-12% of the experimental data, and the equation in NI/Ncd criterion could correlate kLa values within +/-15.6% with an exception of 26.8% for NI = 16.7 Hz.

• 出版日期2012