Comparison of Volumetric Mass Transfer Coefficient in Air-Water & Air-CMC Systems in Downflow Jet Loop Reactor

摘要

Mass transfer studies were carried out in a down flow jet loop reactor for air-water and air-CMC system. The effect of operating variable (liquid flow rate), geometrical variable (draft tube to column diameter ratio, D_E/D, (0.31-0.58)), nozzle diameter (6, 8, 10 and 12 mm), projection depth of the aeration tube from the nozzle (4-24mm) and immersion height (100, 150 and 200mm) on K_(La) was studied. It was observed that the K_(La) increased with an increase in liquid flow rate. It was found that the K_(La) increased up to a D_E/D ratio of 0.44 and then decreased with further increase in D_E/D ratio. The optimum nozzle diameter, optimum projection depth, and optimum immersion height of the two-fluid nozzle were found to be 10 mm, 19 mm and 100 mm. For air-CMC system the increase in CMC concentration the K_(La) decreases.