| 摘要 |
PURPOSE:To prevent catalytic activity from being deteriorated with NOx by mixing a catalyst consisting of oxide shown in a specified general formula with MgO or oxide contg. MgO as a main component or calcining this mixture and forming a catalyst for purifying exhaust gas. CONSTITUTION:A catalyst consisting of oxide shown in a formula I (Ln shows at least one kind of element selected from among La, Ce, Pr and Na, M shows at least one kind of element selected from among Cr, Mn, Fe, Ni and V, A shows at least one kind of element selected from among Ca, Sr and Ba, 0<=x<=1, 0<=y<=1, delta shows defective number of oxygen) is formed. A catalytic body for purifying exhaust gas is obtained by mixing the catalyst consisting of oxide with MgO or oxide contg. MgO as a main component or calcining this mixture. In this catalytic body, its catalytic capacity is not almost deteriorated even in the atmosphere of exhaust gas contg. large amounts of steam and NOx. |
