No abstract

No abstract

No abstract

The effect of 50.8 mm diameter disc shaped mobile internals (MIS) on gas-solid contacting was studied in a large two-dimensional fluidized bed by means of non-reactive tracers. MIS were found to improve substantially the mass transfer coefficient between the bubble and dense phases. However, they also increased the gas dispersion in the dense phase. ~ -On a Ctudit I'effet des garnissages mobiles (MI) en forme de disque de 50,8 mm de diamhtre sur le contact gaz-solide dans un grand lit fluidis6 bidimensionnel au moyen de traceurs non rkactifs. On a montr6 que les garnissages amkliorent de manikre significative le coefficient de transfert de matihe entre la phase dense et la phase bulle. Ceux-ci augmentent toutefois la dispersion du gaz dans la phase dense.Keywords: fluidization internals, mobile internals, mass transfer in fluidization, dispersion in fluidization. t is generally recognized that bubbles are responsible for

No abstract