Fixed bed and fluidized bed. Ref: BSL, McCabe & Smith. Why fixed (or fluidized) bed? Expensive Catalyst enzyme (immobilized) Large Surface area Used in reaction/adsorption/ elution (for example). Goal: Expression for pressure drop, try some examples. Fixed bed . Filled with particles
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In terms of average particle diameterFixed bed - pressure drop calculation (Laminar Flow)
In terms of specific surface area
Ergun Equation for packed bedFixed bed - pressure drop calculation (Turbulent Flow)
Eqn in McCabe and Smith