DESICCANT APPLICATIONS

One of the primary applications for desiccant materials is in the dehydration of air. Essentially any manufacturing facility requires dry air for operating pneumatic devices (valves, switches, etc…), providing good quality air purge for instrument enclosures, or as a general utility. As such, the design and fabrication of air dehydration units is a significant business in which several major and many minor Original Equipment Manufacturers (OEMs) participate. Air Dryer units are available in a variety of configurations, including both thermally regenerated and pressure swing designs. Design type is dictated by application and desired effluent quality.

Many other process gases are also commonly dehydrated with desiccant materials. These include nitrogen, hydrogen, natural gas, and carbon dioxide. Fixed bed adsorption is also widely employed in the dehydration of various hydrocarbon streams in petrochemical plants and oil refineries. Products such as LPG, butanes, and gasoline are all commonly dehydrated to control haze, minimize corrosion, and achieve finished product specifications. Other streams, such as Alkylation and Isomerization unit feeds, monomer (ethylene, propylene, styrene, butadiene, isoprene) feed to polymerization reactors, and a variety of other process feed streams require dehydration to protect water-sensitive catalysts.

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