http://www.kailicatalyst.com/p....alladium-series-cata

Molecular sieves refer to a class of substances with uniform micropores and the pore size is equivalent to the general molecular size. Molecular sieves are widely used and can be used as high-efficiency desiccants, selective adsorbents, catalysts, ion exchangers, etc. However, the cost of using chemical raw materials to synthesize molecular sieves is very high.