期刊
CHEMICAL ENGINEERING JOURNAL
卷 283, 期 -, 页码 1044-1050出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.08.040
关键词
Nitrogen oxides; NH3-SCR; WO3; Mn-Zr mixed oxide; In situ DRIFTS
资金
- National Natural Science Foundation of China [21077009, 21377010]
- Fundamental Research Funds for the Central Universities [YS1401]
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex [SCAPC201402]
- Program for New Century Excellent Talents of the Chinese Ministry of Education [NCET-13-0650]
A series of WO3-doped Mn-Zr mixed oxide catalysts were investigated for the selective catalytic reduction of NOx by NH3 (NH3-SCR). It was found that the added WO3 significantly enhanced the catalytic performance of Mn-Zr mixed oxide catalyst for NH3-SCR of NOx. In situ diffuse reflectance infrared transform spectroscopy (DRIFTS) studies revealed that the highly dispersed WO3 not only resulted in more acid sites formed on the catalyst surface, but also inhibited the adsorption of the inactive nitrate specie, leaving more active sites available for the adsorption of NH3. In addition, the synergetic effect between W and Mn contributes to improving the redox property of the catalyst. Therefore, the high catalytic deNO(x) performance was obtained over WO3-promoted Mn-Zr mixed oxide catalyst. (C) 2015 Elsevier B.V. All rights reserved.
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