MnOx-CuOx cordierite catalyst for selective catalytic oxidation of the NO at low temperature.

Low-value solid waste cordierite honeycomb ceramics were used as carrier of SCO denitration catalyst, and the active component was supported by the impregnation method to improve the performance of the catalyst. Firstly, the effect of calcination conditions on the denitration performance of the Mn-loaded cordierite catalyst was studied for the cordierite-loaded active component MnO. Secondly, the preferred catalyst was reloaded with another active component to further improve its denitration performance; the bimetal ratios were affected by the denitration performance, which was, finally, characterized by XRD, XPS, and SEM. The result shows the following: (1) Mn-loaded cordierite prepared at 450 °C for 3 h has a good denitration effect; (2) the MnO-CuO/CR catalyst is superior to MnO-FeO/CR, MnO-CoO/CR, and MnO-CeO/CR; (3) the MnO crystal form in the single metal-supported catalyst plays a major role, and CuMnO in the bimetallic catalyst affects the performance and activity of the catalyst. Graphical abstract.