A Relative Method For The Determiniation Of The Adsorption Capacity Molecular Sieves

A new method for the determination of the absorption capacity of molecular sieves is described. The method is based on the functional priniciple of the vacuum pump with molecular sieves. The principle of the method consists in that the pumpdown time for a vacuum (for example 10−2 mm Hg) is inversely proportional to the adsorption capacity of molecular sieves. The method is relative since it requires a standard (a molecular sieve whose adsorption capacity is determined by a standard method). For the molecular sieves that must be studied it is sufficient to measure the pumpdown time of the same vacuum level obtained in the case of the standard molecular sieve. The adsorption capacity was obtained from a relation of the form: Te/Tx = Cx/Ce.