Activated alumina as a kind of desiccant absorbs the moisture in the compressed air during the adsorption process of the desiccant dryer. During the regeneration process of the dryer, the activated alumina loses the moisture and stays dry again to meet the next adsorption.
Alumina is a porous material with an internal surface area of up to hundreds of square meters per gram of alumina. Its physical properties determine the strong adsorption of substances with a relatively high polarity, such as water, and this adsorption capacity The change in adsorption temperature changes, the lower the adsorption temperature, the stronger the adsorption capacity of the adsorbent.
When the compressed air containing water passes through dryer filled with activated alumina, the physical properties of the aforementioned alumina are utilized to adsorb the moisture in the compressed air in the large pores of the alumina, thereby achieving the purpose of drying the compressed air. When the alumina has been in operation for a certain period of time, the adsorbed water reaches a saturated equilibrium, and it will not absorb the moisture in the compressed air. Since the alumina has the property that the adsorption capacity changes with the temperature, it can be oxidized at this time. Aluminum is heat treated to restore its adsorption capacity. It is because activated alumina itself possesses these characteristics that we can recycle it by means of heat regeneration, so that the adsorption drying process can be widely used in practical industrial application.
The simple details of activated alumina:
The XR activated alumina in air dryer Production:
The packages of XR activated alumina:
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Pore volume, bulk density and surface area could be adjusted as your requirement.