Citation: Qijie Jin, Yuesong Shen, Shemin Zhu, Xihong Li, Min Hu. Promotional effects of Er incorporation in CeO₂(ZrO₂)/TiO₂ for selective catalytic reduction of NO by NH₃[J]. Chinese Journal of Catalysis, ;2016, 37(9): 1521-1529. doi: 10.1016/S1872-2067(16)62450-6 shu

Promotional effects of Er incorporation in CeO₂(ZrO₂)/TiO₂ for selective catalytic reduction of NO by NH₃

Qijie Jin ^a, ,
Yuesong Shen ^a ,
Shemin Zhu ^a ,
Xihong Li ^b ,
Min Hu ^b

a. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM), College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China;
b. Shandong Gemsky Environmental Technology Co., Zibo 255086, Shandong, China

Received Date: 5 April 2016
Revised Date: 27 April 2016

Fund Project: This work was supported by the National Natural Science Foundation of China(51272105), Jiangsu Provincial Science and Technology Supporting Program(BE2013718), Research Subject of Environmental Protection Department of Jiangsu Province of China(2013006), and Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).

A series CeO₂(ZrO₂)/TiO₂ catalysts were modified with Er using a sol-gel method. The catalytic activity of the obtained catalysts in the selective catalytic reduction(SCR) of NO with NH₃ was investigated to determine the appropriate Er dosage. The catalysts were characterized using X-ray diffraction, N₂ adsorption, NH₃ temperature-programmed desorption, H₂ temperature-programmed reduction, photoluminescence spectroscopy, electron paramagnetic resonance spectroscopy, and X-ray photoelectron spectroscopy. The results showed that the optimum Er/Ce molar ratio was 0.10; this catalyst had excellent resistance to catalyst poisoning caused by vapor and sulfur and gave more than 90% NO conversion at 220-395℃ and a gas hourly space velocity of 71 400 h^-1. Er incorporation increased the Ti³⁺ concentrations, oxygen storage capacities, and oxygen vacancy concentrations of the catalysts, resulting in excellent catalytic performance. Er incorporation also decreased the acid strength and inhibited growth of TiO₂ and CeO₂ crystal particles, which increased the catalytic activity. The results show that high oxygen vacancy concentrations and oxygen storage capacities, large amounts of Ti³⁺, and low acid strengths give excellent SCR activity.
- CeO₂(ZrO₂)/TiO₂,
- Erbium incorporation,
- Selective catalytic reduction,
- Nitrogen oxide,
- Catalytic performance
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Promotional effects of Er incorporation in CeO2(ZrO2)/TiO2 for selective catalytic reduction of NO by NH3

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Promotional effects of Er incorporation in CeO₂(ZrO₂)/TiO₂ for selective catalytic reduction of NO by NH₃