收录:
摘要:
Fe pillared sepiolite (Fe-PILSEP) was prepared by the intercalation of polymerization of iron hydroxyl ions with sepiolite and then calcining at 450 degrees C. Cu supported on Fe-PILSEP catalysts (xCu/Fe-PILSEP (x=5, 10, 15, 20wt%)) with different loadings were prepared by impregnation method. xCu/Fe-PILSEP were characterized by X-ray diffraction (XRD), X-ray fluorescence spectrometry (XRF), N-2-sorption analysis, H-2-Temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS) techniques and their catalytic performance for the selective catalytic reduction (SCR) of NO by propene were also studies. The results of N-2-doped/adsorption and TGA show that due to pillaring, there is a distinctively increase of Fe-PILSEP in surface area, pore volume and thermal stability. XRD and XPS results verify that Fe2+/Fe3+ and Cu+/Cu2+ are co-existed, respectively, over Xcu/Fe-PILSEP catalyst and there is some strong interaction among Cu, Fe and sepiolite support. H-2-TPR results show that there are isolated Cu2+ and oxygenated clusters CuO species and the amount of latter increases with copper loading. The xCu/Fe-PILSEP samples display significant activity in the NO reduction with a maximum for a Cu content close to 10wt%. A decay of catalytic activity is observed with the increase of copper loading, due to the increase of oxygenated clusters CuO species.
关键词:
通讯作者信息:
电子邮件地址: