Characterization of the hydrodynamics enables operation of trickle bed reactors within the desired flow regime and under conditions for uniform distribution of gas and liquid, resulting in an essentially plug flow contacting pattern. Studies reported in the literature are typically restricted to systems of beds packed with catalyst supports of a uniform size. This work addresses the impact of supports with particle size distributions on reactor hydrodynamics. An experimental database of pressure drop and liquid holdup was developed and, by careful definition of the particle diameter, literature models were adapted to account for the particle size distribution. The resulting models give improved predictions for packing media with a particle size distribution while maintaining applicability to uniform systems.

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