1.Desiccant Dryer: A typical desiccant dryer uses a 1.6mm (1/16 inch) pellet molecular sieves. A 50mm (2 inch) depth of 3mm*3mm (1/8*1/8 inch) ceramic pellets are placed under the molecular sieves directly.

2.Hydrocracker: In typical petroleum processes using a 3mm (1/8 inch) diamter pellet catalyst, the bed is identical to the one described above, except that the catalyst cab be placed directly on top of 6mm (1/4 inch) support medias, thus eliminating the layer of pelletized support media.

3. Petrochemical Reaction: In petrochemical applications, such as oxidaton reactions, larger catalyst and supports, typically 6mm (1/4 inch) diameter are used.

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