Liquid phase mixing model for stirred gas-liquid contactor

Abstract Impulse response experiments were carried out on the liquid phase of a continuous flow air/water system contained in a 22 cm diameter vessel stirred with a 7.62 cm diameter six-bladed disc turbine impeller. Experimental results were obtained for three impeller speeds, ten air rates and four inlet and outlet combinations of top and bottom. The application of a numerical procedure for Laplace transform inversion and an optimisation routine for curve fitting, allowed a consideration of models of considerable complexity. A digital computer was used to determine the appropriate values of the parameters of the most suitable model which satisfied the experimental responses. The effects of the impeller speed and air flow rate on the values of the various parameters of the model were examined. Good agreement was found between the values of the parameters and similar published data for the unaerated system. Also it was shown that the presence of the gas does not greatly affect the liquid phase mixing characteristics.