Three THINGS TO KNOW WHEN PURCHASING MOLECULAR SIEVES

Molecular Sieve Materials

In a strictly scientific sense, many natural desiccant dehumidifiers like lime, clay and silica gel also work by sieving molecules of water vapor, but commercial molecular sieves are made of synthetic crystalline aluminosilicates. Unlike desiccants found in nature, the control of pore size during manufacture produces selective adsorption characteristics.

The Advantages of Molecular Sieves

Molecular sieves typically adsorb water much faster than other desiccant air dryers and they can reduce the humidity to much lower levels that the standard silica gel. They are also more effective than natural desiccants for applications that exceed normal room temperature. When properly used, they can be effective in reducing water molecules as low as 1ppm in specialized containers or to 10% relative humidity in packaging.

Regeneration and Reuse of Molecular Sieves

While some molecular sieves that remove alcohols and aromatic hydrocarbons use pressure to regenerate the sieve, the molecular sieves that are used for water-adsorption are usually regenerated by heating. For most industrial purposes, these temperatures range from about 250° to 450°F, similar to baking temperature settings for a standard kitchen oven.

**The above information is for customers’ reference only. Performance characteristics vary depending on specific application. please contact us by email at info@fznewmaterials.com if detailed application method for molecular sieve needed.