Zeolite molekyulu sieves ali ndi mphamvu yolekanitsa yamphamvu pa nayitrogeni ndi mpweya.Ili ndi mawonekedwe ndi mawonekedwe a kristalo, pamwamba pake ndi chigoba cholimba, ndipo zibowo zamkati zimatha kutenga gawo la mamolekyu adsorbing.Pali pores olumikizidwa wina ndi mzake pakati pa mapanga, ndipo mamolekyu amadutsa pores.Chifukwa choyera cha pores, kukula kwa pore kugawa kwa molekyulu ya molekyulu kumakhala kofanana kwambiri.Masieve a mamolekyulu amasankha mamolekyu kutengera kukula kwa pores mkati mwa makhiristo awo, ndiye kuti, ma molekyulu amtundu winawake uku akuthamangitsa mamolekyu azinthu zazikulu.