The Denstone® brand support media are used in a variety of processes and applications -- after all, Denstone is recognized as the most trusted bed support media for optimized reactor performance, economy and reliability.  Denstone support media's unmatched properties and performance are characterized by high raw material standards, tightly controlled manufacturing, and the most critical attributes -- compressive strength, thermal shock and impact resistance, and survivability under depressurization.

Desiccant Dryer A typical desiccant dryer uses a 1.5 mm (1/16 in.) extrudate molecular sieve.  A 5 cm (2 in.) depth of 3 mm (1/8 in.) Denstone spheres are placed directly under the molecular sieve.
Hydrocracker In typical petroleum processes using a 3 mm (1/8 in.) diameter, extrudate catalyst, the bed is identical to the one described above, except that the catalyst can be placed directly on top of 6 mm (1/4 in.) Denstone spheres.  The catalyst is then supported by 6 mm (1/4 in.) Denstone support spheres, followed by layers of 13 mm (1/2 in.) and 19 mm (3/4 in.).
Petrochemical Reactor In petrochemical applications such as oxidation reactions, larger catalysts - typically 6 mm (1/4 in.) diameter -- are used.
Hydrotreater / Downflow Reactor These petroleum processes can use catalyst as small as 1.3 mm (1/20 in.) in diameter.  Frequently, downflow reactors use larger Denstone spheres at top because they have the mass necessary to prevent the top of the bed from being dished out by the inlet velocity of the gas impinging on the bed's surface.
Upflow Reactor When it is necessary to prevent catalyst bed fluidization, spheres are graded in reverse order on top of the bed.  The sphere size depends upon the size of the catalyst.  To provide sufficient mass to prevent fluidization, at least 22.9 cm (9 in.) of Denstone support media are installed atop the bed.

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