Hanieh Zarin Toranj - Department of Chemical Technology, Iranian Research Organization for Science and Technology (IROST),Tehran
Razieh Habibpour - Department of Chemical Technology, Iranian Research Organization for Science and Technology (IROST),Tehran
Eslam Kashi - Department of Chemical Technology, Iranian Research Organization for Science and Technology (IROST),Tehran

Now a day, the increasing awareness people about the standards of living for pollution air, andenvironmental protection, pollution from exhaust has become a major and extremely Seriously environmentalproblem, that sets forward higher provisions for filtration, of catalyst converter. Rare earths like Lanthanumand Cerium have been widely applied in catalyst converters because of well catalytic performance. Therehave been excellent oxygen storage and high hydrothermal stability, so can been a suitable alternative toplatinum group metals.

Catalyst Converter, Rare earth, Perovskite, Lanthanum, Cerium