· Physical description: brittle, ceramic-type material.

· Particle size: spherical particles as small as 0.03" diameter.

· Coefficient of thermal expansion 3.5x 10-6 / oF

· Bulk crush strength approximately 500 psi

· Bulk density 50 lbs/cu.ft.

· Bed depth 8 ft.

· Total cycle time: 4 hours

· Feed gas: air

· Feed temperature: ambient

· Feed pressure: 100 psia.

· Feed flow direction: upward

· Feed flow velocity: the velocity is specified such that the upward lifting force on the granular material, that is caused by pressure

drop across the bed, is less than 50% of the weight of the bed. In most cases the superficial velocity will be less than 1 ft/sec.

· Regeneration gas: nitrogen

· Regeneration temperature: 400 deg. F

· Regeneration pressure: 15 psia.

· Regeneration flow direction: downward

· Regeneration flow velocity: In most cases the superficial velocity will be less than 6 ft/sec.