Two series of catalysts based on Mn and Ce oxides were prepared by co-precipitation and impregnation, in order to study their physicochemical properties and catalytic performance in the simultaneous reduction of NO and oxidation of o-DCB. Co-precipitation catalysts showed better activity than those prepared by impregnation because of the formation of a MnO_X-CeO₂ solid solution, which improves redox and acid properties. Moreover, the catalysts with MnO_X content between 80 and 90 mol.%, in which a coexistence between solid solution phase and Mn₂O₃ crystal was found, presented NO conversion above 90 % at temperatures below 250 °C and o-DCB conversion above 80 % at temperatures above 200 °C. The main by-products of SCR were N₂O, produced in the whole range of temperature, and NO₂, formed at temperatures above 300 °C. Selectivity to CO₂ above 80 % was obtained using co-precipitation catalysts in all temperature range. Deactivation experiments showed that oxidation reaction strongly contributes to deactivate impregnation catalysts, whereas the effect of deactivation is lower in co-precipitation catalysts at high Mn contents.

通过共沉淀和浸渍制备了两种基于Mn和Ce氧化物的催化剂，以研究其理化性质和催化性能，同时还原o-DCB和NO。共沉淀催化剂由于形成了MnO _X -CeO ₂固溶体而比浸渍法具有更好的活性，从而改善了氧化还原和酸性质。此外，MnO _X含量在80至90mol。％之间的催化剂，其中固溶相与Mn ₂ O ₃共存。发现结晶，在低于250°C的温度下NO转化率高于90％，在高于200°C的温度下o-DCB转化率高于80％。SCR的主要副产物是在整个温度范围内产生的N ₂ O和在高于300°C的温度下形成的NO ₂。在所有温度范围内，使用共沉淀催化剂可获得80％以上的CO ₂选择性。失活实验表明，氧化反应对浸渍催化剂的失活有很大作用，而在高Mn含量的共沉淀催化剂中，失活作用较低。