Effect of Microwave Calcination on the Structure and Denitration Performance of CeO₂/TiO₂ Catalyst AITranslate

Basic Information:

DOI：

Chinese Library Classification Number:O643.36[理学]

Citation Information:

A series of CeO₂/TiO₂ catalysts with varying CeO₂ loadings were prepared by impregnation with cerium nitrate solution followed by microwave calcination,using modified TiO₂ as the catalyst carrier.The CeO₂/TiO₂ catalysts were characterized using XRD,SEM,H2-TPR,NH₃-TPD,XPS,and in-situ DRIFTS techniques,and the influence of preparation conditions(including microwave calcination temperature,mi-crowave power,and CeO₂ loading)on the denitration performance of the catalysts was systematically stu-died.The results indicate that the CeO₂/TiO₂ catalyst with 15%CeO₂ loading exhibits the best denitration performance when the microwave calcination temperature is 500℃and the microwave power is 2000 W.Its denitration efficiency remains above 80%at 300~450℃,with a peak denitration efficiency exceeding 90%at 350℃.The 15%CeO₂/TiO₂ catalyst exhibits a loose and porous surface structure,abundant acidic sites,excellent redox capability,and a high proportion of Ce3+and Oα,which contribute to its superior de-nitration activity.During the NH₃-SCR reaction,the 15%CeO₂/TiO₂ catalyst follows both the E-R and L-H mechanisms.