Izingxenye eziyinhloko emoyeni i-nitrogen ne-oxygen, kusetshenziswa izinga lokushisa elizungezile, i-nitrogen nomoya-mpilo emoyeni ku-zeolite molecular sieve (ZMS) ukusebenza kwe-adsorption kuhlukile (i-oksijeni ingadlula kanye ne-nitrogen adsorption), dweba inqubo efanele, futhi wenze i-nitrogen. kanye nokuhlukaniswa kwe-oxygen ukuze uthole umoya-mpilo.