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论文类型：期刊论文

发表时间：2016-03-01

发表刊物：5th Sino-Australian Symposium on Advanced Coal and Biomass Utilisation Technologies

收录刊物：SCIE、EI、CPCI-S

卷号：30

期号：3

页面范围：1810-1814

ISSN号：0887-0624

摘要：Selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR) at low temperatures is a promising technology for DeNOx (removal of NOx) as a result of its high NOx conversion, excellent selectivity, and broad application prospect. As a result of the remarkable activity under low temperature for SCR performance, Mn-based catalysts have attracted extensive attention. In this work, a series of WaMn1 - aOx (a = 0, 0.25, 0.33, 0.5, or 1) catalysts were synthesized by a one-step urea co-precipitation method and characterized by X-ray diffraction, Raman, X-ray photoelectron spectroscopy, thermogravimetric analysis, and scanning electron microscopy. Thereamong, the W0.33Mn0.66Ox catalyst showed the highest NH3-SCR activity within a broad temperature range of 230-470 degrees C. In addition, the active Mn and W species were in highly amorphous or poorly crystalline states. It was revealed that the interaction of W and Mn increased the chemistry oxygen content of the catalysts, thus enhancing the low-temperature SCR performance.