Poisoning-resistant catalytic composite.

摘要

Poisoning-preventive and poisoning-resistant materials are described, including: a poisoning-preventive layer-possessing support comprising a support and, formed thereon, a poisoning-preventive layer having a compound containing at least one element selected from the Group IIa element of the periodic table; a poisoning-resistant catalyst for catalytic converter, which comprises a support, a noble metal catalytic component deposited on the support, and a poisoning-preventive layer formed on the side of the catalytic component exposed to an exhaust gas, said poisoning-preventive layer having a compound containing at least one element selected from the Group IIa elements of the periodic table; an exhaust gas converter device comprising a poisoning-preventive material provided on the exhaust gas inlet side, said poisoning-preventive material being either a ceramic material or the poisoning-preventive layer-possessing support as described above, said ceramic material comprising a compound containing at least one element selected from the Group IIa elements of the periodic table or comprising said compound and other ceramic compound, and a catalyst provided on the exhaust gas outlet side, said catalyst comprising a support and a noble metal catalytic component deposited on the support; and a poisoning-preventive gasoline composition comprising a gasoline and a compound containing at least one element selected from the Group IIa elements of the periodic table.