Difficulty: Easy
Correct Answer: Sparger
Explanation:
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
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