A novel configuration of a three-phase internal loop airlift reactor is proposed. The draft is divided in two sections: top) gas-liquid contact section; bottom) liquid-solid contact section. Solids particles are fluidized in the bottom section by liquid circulation. The main advantage compared with classic airlift or three-phase fluidized bed is the reduced stress on particles as interference with bubbles is prevented. Experiments with silica sand (325 micronm diameter) were carried out to characterize the hydrodynamics of the airlift. The influence of superficial gas velocity, overall solids hold-up and sparger height were assessed. A theoretical analysis was proposed to derive simple design criteria.
A novel three-phase airlift reactor without circulation of solids / Olivieri, Giuseppe; Marzocchella, Antonio; Salatino, Piero. - In: CANADIAN JOURNAL OF CHEMICAL ENGINEERING. - ISSN 0008-4034. - STAMPA. - 88:4(2010), pp. 574-578. [10.1002/cjce.20314]
A novel three-phase airlift reactor without circulation of solids
OLIVIERI, GIUSEPPE;MARZOCCHELLA, ANTONIO;SALATINO, PIERO
2010
Abstract
A novel configuration of a three-phase internal loop airlift reactor is proposed. The draft is divided in two sections: top) gas-liquid contact section; bottom) liquid-solid contact section. Solids particles are fluidized in the bottom section by liquid circulation. The main advantage compared with classic airlift or three-phase fluidized bed is the reduced stress on particles as interference with bubbles is prevented. Experiments with silica sand (325 micronm diameter) were carried out to characterize the hydrodynamics of the airlift. The influence of superficial gas velocity, overall solids hold-up and sparger height were assessed. A theoretical analysis was proposed to derive simple design criteria.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
