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標題: Effects of sodium modification, different reductants and SO2 on NO reduction by Rh/Al2O3 catalysts at excess O-2 conditions
作者: Chang, F.Y.
Wey, M.Y.
Chen, J.C.
關鍵字: catalyst;NO;Rh/Al2O3;Rh-Na/Al2O3;SO2;selective reduction;3-way catalyst;oxygen;co;c3h6;h2o;rh/gamma-al2o3;ir/sio2
Project: Journal of Hazardous Materials
期刊/報告no:: Journal of Hazardous Materials, Volume 156, Issue 1-3, Page(s) 348-355.
Although many catalysts of NO reduction have been developed, the presence of excess O-2 and SO2 significantly inhibits their performance when they are used to treat the incineration flue gas. To solve such problem, this study prepared new Rh/Al2O3 catalysts and investigated the effects of Na modification, SO2 and different reductants. Experimental results indicated that the average removal efficiency of NO at such high O-2 concentrations exceeded 80% when the Rh/Al2O3 catalysts were used. CO was a better reductant than C3H6 and the best concentration ratio of reductant/NO was equal to 1. Adding Na to modify Rh/Al2O3 catalysts significantly enhanced the removal efficiency of NO from 80 to 99% at 250-300 degrees C, especially at relative high SO2 concentrations. Unfortunately, Rh-Na/Al2O3 catalysts do not have long-time activities for NO reduction, possibly because of the formation of NaNO3. Both Rh/Al2O3 and Rh-Na/Al2O3 catalysts have good performance for NO reduction, they can feasibly be used to reduce NO in the flue gas from waste incineration. (C) 2007 Elsevier B.V. All rights reserved.
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2007.12.026
Appears in Collections:環境工程學系所

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