High crushing strength activated alumina is an excellent all-purpose desiccant for use in compressed air dryers and desiccant air dryers.
Activated Alumina is a smooth spherical aluminum oxide (A12O3) with high crush strength. It is high porous and have a high surface area greater than 350 m2/g. It is an excellent desiccant for liquids and gases, and achieve dew points from -40°F (-40°C) depending on the operating conditions and the design of the dryer. Activated Alumina will adsorb some certain molecules.
Activated Alumina works as a desiccant through adsorption, so as air passes through the Activated Alumina beads, the activated alumina filter and dried out the water. Even if immersed in a liquid, the Activated Alumina will not fall apart or soften.
XR offers Activated Alumina in three different sizes of beads: 1/8” (3‐5 mm), 3/16” (4‐6 mm) and 1/4” (6-7mm). Activated Alumina in a 1/8” (3-5 mm) bead size is most commonly used in regenerative dryers.
Activated Alumina can be restored to its original adsorption efficiency by heating the desiccant to any temperature from 350° to 600°F (177° to 316°C). When the Activated Alumina desiccant is heated as described above, the water stored in it is released, which enables the Activated Alumina filters to be reused over and over again.