How much water can molecular sieves absorb
For a large number of manufacturing processes the chemicals produced will contain moisture (water) , oxygen , nitrogen and other gases. This will affect the purity of the chemicals which are being produced. For most applications, very high purity is required and if the chemicals are impure, the price which the manufacturer can charge will be lower. So to improve the purity of the chemicals which are produced,the manufacturer will use one or more molecular sieve which will adsorb the molecules of the various impurities depending on the type of sieve.
One of the main characteristics of all types of molecular sieves is the pore size. This is the size of the pores in the sieve material which is usually specified by the manufacturer. The pore size is usually defined in terms of angstrom (nano meter). The molecular sieve will absorb molecules which are smaller than the pore size and all the other molecules will not be absorbed. So effectively the sieve is like a filter, absorbing molecules which are smaller in size, while excluding the larger molecules.