What is Adsorption Capacity?
Adsorption capacity is defined as the accumulation of the solute molecules at the surface of a solid. This capacity is directly proportional to the area of the surface exposed and is dependent on the solute partial pressure and the temperature. An increase in temperature reduces the adsorption capacity of activated alumina as the adsorption of water on alumina is exothermic. Adsorption capacity depends on the surface site reactivity and is measured by the volume of adsorbed water per unit of surface area. Water in the air actually sticks to the alumina itself in between the tiny passages as the air passes through them. The water molecules become trapped so that the air is dried out as it passes through the filter. This process is reversible, and when the alumina desiccant is heated to between 350-600 F (177-316 C) it releases all of the water stored inside it. The process of heating the activated alumina is called regenerating the desiccant. When a gas is compressed the partial pressur
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