CATALYTIC ACTIVITY OF CU ION-EXCHANGED METALLOALUMINOPHOSPHATES IN NODECOMPOSITION

NO decomposition was investigated over Cu ion-exchanged aluminophospha te molecular sieve catalysts. Cu ions in cationic positions balanced b y one framework negative charge in the metalloaluminophosphates of AlP O-5 and AlPO-11 structures exhibited catalytic activity in NO decompos ition comparable with that of Cu-ZSM-5. No catalytic activity of the C u ions incorporated during syn thesis of molecular sieves into the fra mework in tetrahedral positions (CuAlPO-11) was observed. The catalyti c activity of Cu-MeAlPO-5 and Cu-MeAlPO-11 was observed with various d ivalent metal ions of the MeAlPO-5 and MeAlPO-11 frameworks (Me = Zn, Mg, Fe, Co) and also with Cu exchanged SAPO-5 molecular sieves. The Cu -MeAlPO-5 and Cu-MeAlPO-11 catalysts differed only in the temperature of the maximum observed catalytic activity.