A SIMPLE GAS-LIQUID MASS TRANSFER JET SYSTEM

Roger Botton (1) , Dominique Cosserat (2) , Souhila Poncin (3) , Gabriel Wild (4)

1 Botton Roger
2 CPE - École Supérieure de Chimie Physique Électronique de Lyon
3 LSGC - Laboratoire des Sciences du Génie Chimique
4 DCPR - Département de Chimie Physique des Réactions

An original gas-liquid contacting system is proposed, consisting of a pump, an orifice, a vertical tube coaxial to the orifice and an impinging plate. The pump generates a downward vertical liquid jet through the orifice situated above the gas-liquid dispersion level. The two phase jet is directed towards an impinging plate near the bottom of the tank and dispersed in the volume of the liquid. Liquid is withdrawn below the impinging plate and recycled. This reactor may be used for gas-liquid reactions (ie hydrogenations) and also to mix liquids, to disperse particles, to oxygenate waste water etc.... Performances and design rules of this equipment are proposed. Then, the results are compared to performances of bubble columns, stirred tanks, and other academic and industrial jet systems. It is shown that, at a given energy dissipation, this system yields much higher mass transfer densities than a classical stirred tank provided with a Rushton turbine. Finally some suggestions about mass transfer mechanisms and efficiency of dissipated power are given.

Mots clés: Gas-liquid reactors; impinging jet; energy efficiency; bubble columns; stirred tank.

Domaines: Génie des procédés

Roger Botton, Dominique Cosserat, Souhila Poncin, Gabriel Wild. A SIMPLE GAS-LIQUID MASS TRANSFER JET SYSTEM. 8th World Congress of Chemical Engineering, Aug 2009, Montréal, Canada. pp.CDrom du congrès. ⟨hal-00436260⟩