A dehumidifier apparatus for low
dew point application is disclosed, which deploys a
desiccant wheel incorporating special adsorbent materials, which are
highly porous, which are either crystalline or amorphous or both or multivariate, with surface area in a range of 500 m2 / g to 10000 m2 / g, and have an
high uptake in a range of X to Y at 0.1-5%
relative humidity (Rh), typically referred to as adsorbent materials with Type-1 isotherm. These dehumidifier apparatuses having
desiccant wheels incorporating special materials have demonstrated the ability to not only be regenerated well at temperatures of less than 100 degC, but have also shown 15-25% higher adsorption performance (water removal), for achieving desired low
dew point under similar operating conditions.