초록

A catalyst for reducing nitrogen oxides from an exhaust gas containing the same in an oxygen rich atmosphere comprising (i) a zeolite having a molar ratio of SiO2/Al2O3 of at least 10, (ii) copper, and (iii) a rare earth ion, an alkaline earth metal and/or a valence variable metal.

대표청구항 ▼

A method of purifying an exhaust gas containing an excess amount of oxygen, which comprises bringing a catalyst into contact with the exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from the exhaust gas, the catalyst comprising: (i) a zeolite having a molar ratio of SiO2/Al2O

A method of purifying an exhaust gas containing an excess amount of oxygen, which comprises bringing a catalyst into contact with the exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from the exhaust gas, the catalyst comprising: (i) a zeolite having a molar ratio of SiO2/Al2O3 of at least 10; and (ii) at least one copper ion and at least one kind of rare earth ion loaded thereon. A method of purifying an exhaust gas containing an excess amount of oxygen, which comprises bringing a catalyst into contact with the exhaust gas in the presence of an organic compound to remove nitrogen oxides, carbon monoxide and hydrocarbons from the exhaust gas, the catalyst comprising: (i) a zeolite having a molar ratio of SiO2/Al2O3 of at least 10; and (ii) at least one copper ion and at least one kind of alkaline earth metal loaded thereon.