期刊
JOURNAL OF MATERIALS SCIENCE
卷 54, 期 24, 页码 14707-14719出版社
SPRINGER
DOI: 10.1007/s10853-019-03919-5
关键词
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资金
- Natural Science Foundation of Fujian Province, China [2016J05048]
- Fujian Institute of Innovation, Chinese Academy of Sciences, Bureau of Science and Technology, Fujian Province, China [2015H0043]
- National Natural Science Foundation of China [21403210]
Commercial V2O5-WO3/TiO2 (abbreviated to VWTi) SCR catalysts are modified with Ce and different contents of Cu in wet impregnation method to improve their alkali metals resistance, which is beneficial for prolonging their service life. After K poisoning, NOx conversion of VWCeCuTi sample modified with 0.30% Ce and 0.05% Cu is 89% at 350 degrees C, which is obviously higher than that of VWTi with a 50% NOx conversion. A series of characterization tests were conducted and verified that the ratio of V5+ and the surface-active oxygen on VWCeCuTi sample increases due to the interaction between V, Ce and Cu. Additionally, with the addition of Ce and Cu, surface acid sites are increased and their stability is strengthened. The enhanced redox property and surface acidity contribute together to the excellent K resistance of VWCeCuTi catalyst.
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