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کتاب دانلود مقاله : The influence of Mn species on the SO2 removal of Mn-based activated carbon cat

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دانلود مقاله :

The influence of Mn species on the SO2 removal of Mn-based activated carbon catalysts 2013

نویسندگان :

Qu Yi-Fana, Guo Jia-Xiu , Chu Ying-Haoa , Sun Ming-Chaoa, Yin Hua-Qiang

فرمت: pdf

چکیده : 

Using Mn(NO3)2 as precursor, a series of Mn-based activated carbon catalysts were prepared by

ultrasound-assisted excessive impregnation method and characterized by X-ray diffraction (XRD), Xray

photoelectron spectroscopy (XPS) and temperature programmed reduction (TPR). The influences of

Mn species and nitric acid pretreatment on the removal role of SO2 were investigated. MnO and Mn3O4

coexist in catalysts calcined at 650 and 800 ◦C and exhibit best SO2 removal ability, whereas Mn2O3

formed in the catalyst calcined at 500 ◦C and shows poor activity. After treatment by nitric acid, the C O

of activated carbon support increases and the crystal size of MnO decreases, resulting in the enhancement

of the catalytic activity. During reaction process, manganese oxides are gradually transferred into MnO2.

And this change directly results in a decrease of activity. But the SO2 removal rate has been maintained

in the range of 30–40%, indicating that MnO2 still has a certain SO2 removal ability.

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