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Abstract
The aim of this study was to compare the pressure drop (Δp) generated by a static mixer with sieve plates in two-phase downflow (water as a continuous phase), and the mass transfer efficiency (kLa, a) with the performance of other static mixers (Sulzer, Kenics, Karman, etc.). The relationships for Δp, kLa and interfacial area (a) calculation depending on liquid and gas phase velocities and geometry of the plates (sieves) in this static mixer are presented. kLa was found to be strictly proportional to the power consumption (P/V) and its values were quite close to those obtained in Sulzer & Kenics mixers with an 8-element mesh. Enhancement factors for oxygen absorption in the sodium sulphite solution and for ozone absorption in Lake Ülemiste water were calculated and the plausible values of the interfacial area (a) were estimated.
ACKNOWLEDGEMENTS
The author gratefully acknowledges the CIES in Washington for the Fulbright scholarship. This is paper 54 from the University of California, Irvine, Urban Water Research Center. The author is also very thankful to the Head of the Urban Water Research Center, Prof. William Cooper for his valuable support and advice in preparation of this paper.