Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China.
Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China.
J Environ Sci (China). 2022 Jan;111:175-184. doi: 10.1016/j.jes.2021.03.022. Epub 2021 Apr 2.
Herein, a series of niobium oxide supported cerium nanotubes (CeNTs) catalysts with different loading amount of NbO (0-10 wt.%) were prepared and used for selective catalytic reduction of NO with NH (NH-SCR) in the presence of CHCl. Commercial VO-WO-TiO catalyst was also prepared for comparison. The physcial properties and chemical properties of the NbO loaded cerium nanotubes catalysts were investigated by X-ray diffractometer, Transmission electron microscope, Brunauer-Emmett-Teller specific surface area, H-temperature programmed reduction, NH-temperature programmed desorption and X-ray photoelectron spectroscopy. The experiment results showed that the loading amount of NbO had a significant effect on the catalytic performance of the catalysts. 10 wt.% Nb-CeNTs catalyst presented the best NH-SCR performance and degradation efficiency of CHCl among the prepared catalysts, due to its superior redox capability, abundant surface oxygen species and acid sites, the interaction between Nb and Ce, higher ratio of Nb/(Nb+ Nb) and Ce/(Ce + Ce), as well as the special tubular structure of cerium nanotube. This study may provide a practical approach for the design and synthesis of SCR catalysts for the simultaneously removal NO and chlorinated volatile organic compounds (CVOCs) emitted from the stationary industrial sources.
在此，制备了一系列不同负载量 NbO（0-10wt.%）的氧化铌负载的氧化铈纳米管（CeNTs）催化剂，并将其用于存在 CHCl 的情况下用 NH 选择性催化还原 NO（NH-SCR）。还制备了商业的 VO-WO-TiO 催化剂进行比较。通过 X 射线衍射仪、透射电子显微镜、BET 比表面积、H 程序升温还原、NH 程序升温脱附和 X 射线光电子能谱研究了 NbO 负载的氧化铈纳米管催化剂的物理和化学性质。实验结果表明，NbO 的负载量对催化剂的催化性能有显著影响。在制备的催化剂中，10wt.% Nb-CeNTs 催化剂表现出最佳的 NH-SCR 性能和 CHCl 降解效率，这归因于其优越的氧化还原能力、丰富的表面氧物种和酸位、Nb 和 Ce 之间的相互作用、更高的 Nb/（Nb+Nb）和 Ce/（Ce+Ce）比，以及氧化铈纳米管的特殊管状结构。本研究可能为设计和合成用于同时去除固定工业源排放的 NO 和含氯挥发性有机化合物（CVOCs）的 SCR 催化剂提供一种实用方法。
