Gas–liquid contacting: which device is used to disperse a gas into fine bubbles within a liquid for mass transfer operations?

Introduction / Context:Mass transfer operations like aeration, stripping, and oxidation require efficient dispersion of a gas into a liquid phase. Equipment selection targets small bubble size and uniform distribution.

Concept / Approach:A sparger (porous plate, drilled pipe, ring, or nozzle) injects gas below the liquid surface, creating bubbles. Smaller bubbles yield higher interfacial area per volume and improve transfer rates. Kneaders and masticators are solids/paste mixers; they do not disperse gas into liquids.

Final Answer:Sparger