Control of NO and Hg0 emissions by SCR catalysts from coal-fired boiler
Control of NO and Hg0 emissions by SCR catalysts from coal-fired boiler
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SCR催化剂控制燃煤锅炉NO和Hg0排放
DOI：
10.1016/j.fuproc.2014.12.044
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发表时间：
2015-07
影响因子：
7.5
通讯作者：
Song Hu
中科院分区：
文献类型：
--
作者：
Zhijun Sun;Xi Xiao;Lushi Sun;Song Hu
CuO/γ-Al2O3and CuO–MnO2–Fe2O3/γ-Al2O3catalysts were synthesized by impregnation method. Their performances for selective catalytic reduction (SCR) were explored in a 200 MW coal-fired power plant boiler tail flue. The effects of catalyst amounts, NH3/NO molar ratios, abrasion resistance, catalyst regeneration and the catalytic efficiencies for Hg0oxidation were also discussed here. The optimum temperature range for the SCR of NO over fresh catalysts was 300 ~ 400 °C. In the optimum temperature range, the efficiencies of the two catalysts were over 80%, with a maximum efficiency of nearly 90% obtained at 350 °C. Reducing the catalyst amounts to half did not change the efficiency dramatically. The highest SCR activity was obtained with NH3/NO molar ratios ranging from 1.0 to 1.2. Abrasion resistance test indicates that the mechanical strength of the catalysts can bear the industrial scale and long-term erosion of fly ash. The activities of the catalysts remained constant during a 200 h test. Meanwhile, the catalysts were able to maintain excellent NO reduction efficiency after three times recycling. CuO/γ-Al2O3and CuO–MnO2–Fe2O3/γ-Al2O3achieved 40% and 80% Hg0oxidation efficiency, respectively. The present study provides a promising catalyst for NO and Hg0removal for coal-fired power plants.
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DOI：
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