- Adsorption is a surface phenomenon on the available surface area of activated alumina. The molecules are adsorbed from gas/liquid phase and remain on activated alumina. The adsorptionSakes place both under static & dynamic conditions. The static adsorption capacity is denoted by the equilibrium capacity at specific relative humidity. Most applications of adsorbents, however, take place under a dynamic condition where the activated alumina is operated at less than the equilibrium capacity depending on design conditions. The static adsorption capacity denotes only the ability and sorptive capacity of activated alumina.
- The regeneration of activated alumina is done to desorb the adsorbate and bring it back to active form. It can be carried out by Thermal, Vacuum or Pressure swing method except when activated alumina is used for chemisorption applications The molecules desorbed by any method are removed from the column by a cold dry purge. The purge gas should be dry.
- The design of the adsorption system is dependent on the various parameters such as temperature, pressure, heat capacities, gas velocities. Fluidization velocity, bed depth, contact time, regeneration pressure drop etc These are the significant parameters in ensuring the performance of activated alumina.
- Activated alumina has infinite shelf life if properly stored in dry place
- Active service lite would be dependent upon design and operation of the plant & use of the adsorbent.
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