Citation: Qi Chun LIN, Ji Ming HAO, Jun Hua LI. Fe Promotion Effect in Mn/USY for Low-temperature Selective Catalytic Reduction of NO with NH₃[J]. Chinese Chemical Letters, ;2006, 17(7): 991-994. shu

Fe Promotion Effect in Mn/USY for Low-temperature Selective Catalytic Reduction of NO with NH₃

Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084

Received Date: 16 January 2006

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 20437010) and the Chinese Postdoctoral Science Foundation (No. 2005037058).

A series of catalysts of Mn/USY and Mn-Fe/USY prepared by impregnation were studied for low-temperature selective catalytic reduction (SCR) of NO with NH₃ in the presence of excess of oxygen. It was found that the addition of Fe enhanced the catalytic performance at low-temperature. Mn-Fe/USY catalyst yielded nearly 100% NO conversion in a range of temperature from 423 to 573 K at a space velocity of 36 000 cm³·g^-1·h^-1,Coexistemce of manganese and iron oxides enhanced the dispersion of the supported oxides, no visible phase of the oxides can be observed on catalyst. The addition of Fe enhanced the number and strength of the Brönsted and Lewis acid sites on the surface of the catalyst, which might promote the absorption of NH₃ to form active intermediate and enhance the catalytic performance at low-temperature.
- Low-temperature SCR,
- Mn/USY,
- Mn-Fe/USY,
- SCR of NO with NH₃
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