As known that a regenerative desiccant dryer typically delivers a dew point of between −40 °F (−40 °C) and −100 °F (−73 °C).
How to choose the material for these dryers to achieve the dew point above?
Activated Alumina as an adsorbent it's a good option for the air dryer. The dew point is −40 °C. But while you request the lower dew point −73 °C, let’s mixing Molecular Sieve.
Molecular sieve is highly porous sodium aluminosilicate bead for the adsorption of a wide range of liquids and gases. It has a fixed pore size according to the material specification. Van Air Systems offers molecular sieve with a 4 angstrom pore size. Because of its high comparative cost, molecular sieve is normally used for special process applications. In compressed air and gas drying applications.
Thus, Activated Alumina and Molecular Sieve are your best option.
