OP-II-3

OP-II-21INTENSIFICATION OF CHEMICAL PROCESSES BY USING OFVORTEX BUBBLING LAYERSKuzmin A.O. 1,2 , Pravdina M.Kh. 3 , Yavorsky A.I. 4 ,Yavorsky N.I. 2,3 , Parmon V.N. 1,21 Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia2 Novosibirsk State University, Novosibirsk, Russia3 Institute of Thermophysics, Novosibirsk, Russia4 Novosibirsk State Technical University, Novosibirsk, RussiaOne of the topical tasks in modern chemical technology is efficient carrying out ofchemical processes in the multiphase media. Currently, various types of multiphasegas-liquid reactors are used for accomplishing the multiphase reactions.In the vortex multiphase device, a highly dispersed gas-liquid mixture is producedin the field of centrifugal forces inside the vortex chamber. The operation of thevortex chamber is based on the rotation of liquid by the tangential entry of gas flowsvia many tangential guiding vanes around the periphery of the vortex chamber. Atcertain regimes there appears a highly dispersed gas-liquid vortex bubbling layer.The basic properties of vortex gas-liquid multiphase layers, principles of itsstabilization, design of model vortex gas-liquid apparatuses are discussed.The study of mass transfer efficiency in model vortex bubbling reactor has beencarried out. The variation of Dankwerts's methods has been developed and used fordetermination of mass transfer parameters («k L » – liquid side mass transfercoefficient, m/sec and «a» – effective gas-liquid interfacial area within vortex layer,m –1 ). The method is based on consumption of CO 2 by carbonate buffer solution. Ithas been shown that maximum value of volumetric mass transfer coefficient «k L a»corresponds to the maximum stability of vortex bubbling layer and consists within therange of 7÷11 s –1 at used experimental conditions. It is established what the value of«k L a» only slightly depends on centrifugal acceleration of vortex layer. Comparisonwith other typical gas-liquid reactors has been made.Homogeneous oxidation of alkaline sulfide solutions by air oxygen with onlysoluble products formation are demonstrated as effective chemical applications ofvortex gas-liquid layers.138