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A novel regeneration method for deactivated commercial NH3-SCR catalysts with promoted low-temperature activities.
Yan, Zheng; Yu, Jingyao; Liu, Huan; Ke, Xin; Wang, Chunyong; Liu, Lili; Wei, Lihong; Yang, Tianhua.
Afiliación
  • Yan Z; Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China. yanzheng@sau.edu.cn.
  • Yu J; Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China.
  • Liu H; Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China.
  • Ke X; Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China.
  • Wang C; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 101408, People's Republic of China. wangchunyong2010@163.com.
  • Liu L; Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing, 100871, People's Republic of China.
  • Wei L; Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China.
  • Yang T; Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, Shenyang, 110034, Liaoning, People's Republic of China.
Environ Sci Pollut Res Int ; 27(33): 41970-41986, 2020 Nov.
Article en En | MEDLINE | ID: mdl-32705549
A novel route is developed for regeneration of deactivated commercial NH3-SCR catalysts, which includes an initial in situ construction of anatase TiO2 porous film, followed by loading of MnOx, CeOx, and Mn-Ce mixed oxides as active components. The regenerated catalysts present largely improved low-temperature denitrification performance due to the synergetic effect of MnOx and CeOx. The denitrification efficiency could reach a high value of 97% at 200 °C and 100% at 250 °C when the Ce-Mn mixed oxides are loaded at the optimized molar quantity ratio of 10:9 (Ce:Mn). Properties and reaction mechanisms of the regenerated catalysts are investigated with characterizations of X-ray photoelectron spectroscopy (XPS), NH3 temperature-programmed desorption (NH3-TPD), H2 temperature-programmed reduction (H2-TPR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Our results demonstrate that the adsorption and oxidation of NO plays a crucial role for these three catalysts even though a difference exists on the reaction pathways. Graphical abstract.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Frío / Amoníaco Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2020 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Frío / Amoníaco Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2020 Tipo del documento: Article
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