1/4" (5-10mm) bead activated alumina
is used both as a pre-bed material to support large desiccant beds
or as a buffer for silica gel beads. Pressure drop is slightly
lower than 1/8" (2-5mm) material. Activated alumina is a porous
form of aluminum oxide. It has a high surface area which adsorbs
vapors without any change in form.
If size is not known or specified,
the 1/8" (2-5mm) size is usually satisfactory. However, if
activated alumina is used in a regenerative dryer and the desiccant
retaining screens cannot be measured, the 1/4" (5-10mm) size should
be used as a bed support (6" layer).
The industry-standard activated
alumina desiccant is used extensively in compressed air dryers.
Activated alumina is for use in both heated compressed air dryers
and heatless / pressure swing compressed air dryers. Dewpoints
to -40°F and lower may be achieved with activated alumina depending
on dryer design and operating conditions. F-200 is a smooth sphere
of activated alumina produced by the unique manufacturing
F-200 is an excellent desiccant for
drying a wide variety of liquids and gases. Although all molecules
are adsorbed to some extent on F-200 activated alumina, those
molecules having the highest polarity are preferentially absorbed.
Stream conditions such as pressure, concentration and molecular
weight of the molecules, temperature and site competing molecules
affect the efficiency of adsorption.
Download Desiccant Material Safety Data Sheet
||1/4" (6.4 mm)
||360m 2 /gram
||30 lbs.( 14kgs)
|Static Sorption @ Relative Humidity %
|@ 58% RH
|@ 97% RH