Experimental Study on a Co-current Gas-Liquid Down Flow Contactor with Gas Entrainment by a Liquid Jet

Autor: A. Dabaliz, Samah Maalej, M. Otterbein, Belkacem Benadda
Rok vydání: 1999
Předmět:
Zdroj: Chemical Engineering & Technology. 22:1043-1049
ISSN: 1521-4125
0930-7516
DOI: 10.1002/(sici)1521-4125(199912)22:12<1043::aid-ceat1043>3.0.co;2-2
Popis: Two-phase flow co-current vertical downflow reactor with gas entrainment by a liquid jet is investigated in an air-water system. Experiments are carried out in order to clarify the flow behavior of the reactor under various conditions. Gas entrainment flow rates and gas holdup are quantified experimentally and their dependency on the liquid jet flow rates are shown. The experimental program also included determination of liquid phase residence time distribution (RTD) characteristics for different liquid jet flow rates. The result of the analysis of the liquid phase RTD curves justified the tank-in-series model flow for the liquid phase. On the basis of these analyses, the reactor hydrodynamics are modeled by the tank-in-series model including dead zones. Good agreement is obtained between theoretical and experimental results assuming the reactor is operating as perfectly mixed. The volumetric mass transfer coefficient k L a L is determined experimentally by a gasing out method. The interfacial area is deduced from the bubble diameter measurements which are determined by visualization experiments.
Databáze: OpenAIRE
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