How They Work
A molecular sieve works like a sponge. When heated, molecular sieves readily dehydrate and shed all water content with little or no damage to the crystal structure. This property means the molecular sieve can be reused many times before it must be replaced. When added to a gas or liquid mixture, the dehydrated sieve absorbs not only water, but also other molecules that fit into the pores on the surface. This action not only dries the mixture, but also removes selected molecules depending on the pore size.