Gas-liquid stirred vessels are widely employed to carry out chemical reactionsinvolving a gas reagent and a liquid phase. The usual way for introducing the gasstream into the liquid phase is through suitable distributors placed below the impeller.An interesting alternative is that of using “self ingesting” vessels where theheadspace gas phase is injected and dispersed into the vessel through suitable surfacevortices. In this work the performance of a Long Draft Tube Self-ingestingReactor (LDTSR) dealing with three-phase (gas-liquid-solid) systems, is investigated.Preliminary experimental results on the effectiveness of this contactor forparticle suspension and gas-liquid mass transfer performance in the three-phasesystem, are presented. Mass-transfer parameter kLa was measured by the recentlyintroduced Simplified Dynamic Pressure Method (SDPM). It is found that thepresence of low particle fractions causes a significant increase of the minimumspeed required for vortex ingestion of the gas. Impeller pumping capacity andgas-liquid mass transfer coefficient are found to be affected by the presence ofsolid particles.
|Numero di pagine||12|
|Rivista||International Journal of Chemical Reactor Engineering|
|Stato di pubblicazione||Published - 2012|
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