典型文献
Enhancement of potassium resistance of Ce-Ti oxide catalyst for NH3-SCR reaction by modification with holmium
文献摘要:
Alkali metal K in exhaust gas has a deactivation effect on NH3-SCR catalysts.In this work,it is discovered that the addition of Ho on CeTi catalyst can remarkably strengthen its K tolerance.The conclusions of Brunauer-Emmett-Teller (BET),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),NH3 temperature programmed desorption (NH3-TPD) and H2 temperature programmed reduction (H2-TPR)analyses demonstrate that the enhancement of K resistance mainly originates from its stronger surface acidity and redox capability,the higher concentration of Ce3+ species and surface chemisorbed oxygen.In situ DRIFT analysis reveals that the introduction of Ho on CeTi can remarkably improve the adsorption of NH3 and NOx species on catalyst surface,accompanied by the intensified reactivity of ad-NH3 species,which should also administer to improve the K resistance.
文献关键词:
中图分类号:
作者姓名:
Chaopeng Duan;Ruitang Guo;Yuanzhen Liu;Guilin Wu;Yufang Miao;Jingwen Gu;Weiguo Pan
作者机构:
School of Energy Source and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Engineering Research Center of Power Generation Environment Protection,Shanghai 200090,China
文献出处:
引用格式:
[1]Chaopeng Duan;Ruitang Guo;Yuanzhen Liu;Guilin Wu;Yufang Miao;Jingwen Gu;Weiguo Pan-.Enhancement of potassium resistance of Ce-Ti oxide catalyst for NH3-SCR reaction by modification with holmium)[J].稀土学报(英文版),2022(01):49-56
A类:
CeTi
B类:
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AB值:
0.642561
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