期刊
CATALYSIS COMMUNICATIONS
卷 84, 期 -, 页码 75-79出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2016.06.001
关键词
Water tolerance; Low temperature NH3-SCR; Trace SiO2 modification; Pore structure; Capillarity
资金
- National High-tech Research and Development (863) Program of China [2015AA03A401]
- National Natural Science Foundation of China [21303082]
- Ministry of Education of China [2013009111005]
- Science and Technology Support Program of Jiangsu Province [BE2014130]
Water tolerance is an important topic for low temperature NH3-SCR, because of the inevitable deactivation of the catalyst in the presence of water. In this work, it was found that by depositing trace SiO2 onto the surface of Mn0.2Ti0.8O2 catalyst, the catalysts displayed enhanced water-tolerance with no compromise of its initial activity. Furthermore, NH3-TPD, H-2-TPR, and XPS results indicated that deposition of SiO2 tuned the pore sizes of the catalysts without modifying their chemical properties, and controlled the inherent capillarity property that led to the improved anti-water performance. This result sheds light on the rational design of NH3-SCR catalysts with enhanced water-tolerance. (C) 2016 Elsevier B.V. All rights reserved.
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