Molecular Sieve Desiccants

Applications:

• Final polishing layer in internally heated desiccant dryers (-40°F & -100°F)
• Applications involving the exclusion of certain molecules from the adsorption surface, e.g. drying natural gas with minimal odorant removal
• Liquid drying applications (ethanol, methanol, etc)
• Superior performance when the air has been pre-dried, often used at the outlet end of the heatless dryer vessel when air must be dried to very low dew points (-100°F range)

Characteristics:

• Higher adsorption capacity at lower relative humidity than either activated alumina or silica gel
• Lower adsorption capacity at high relative humidity
• Requires higher temperature for regeneration than does silica gel or activated alumina
• "Sieves" molecules based on size and configuration thus molecular sieves are used to adsorb specific molecular types
• CNG II – Molecular Sieves designed specifically for natural gas applications