A molecular sieve material is designed with uniform pores that allow smaller molecules to enter these pores and larger molecules pass through the system without being absorbed. A mixture of molecules can enter a stationary bed of material and the components of highest molecular weight (which are unable to pass into the molecular pores) leave the bed first, followed by successively smaller molecules. Although some molecular sieves are used in chromatography, a separation technique that sorts molecules based on their size, the industrial application is typically used to dry gases or hydrocarbon liquids and alcohols.
To regenerate the media, molecular sieve beds are usually stripped with steam or a hot carrier gas and the adsorbed water is released. For continuous operation, it is common to have a 3-bed system. One in operation, one regenerating and one on standby. Accelerated Process Systems can provide modular molecular sieve systems. Contact us for more information.