The poisoning effect of Na and K on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3: A comparative study

作者：Guo, Rui-tang^*; Wang, Qing-shan; Pan, Wei-guo; Zhen, Wen-long; Chen, Qi-lin; Ding, Hong-lei; Yang, Ning-zhi; Lu, Chen-zi

来源：Applied Surface Science, 2014, 317: 111-116.

DOI：10.1016/j.apsusc.2014.08.082

• Mn/TiO2 catalyst
• Alkali metal
• Deactivation
• Characterization
• DFT

Mn/TiO2 catalyst is of high activity for low temperature selective catalytic reduction (SCR) of NO with NH3. And the deposition of alkali metal would lead to the deactivation of Mn/TiO2 catalyst. In this paper, the poisoning effect of Na and K on Mn/TiO2 was investigated based on experimental and theoretical study. It was found that K had a stronger poisoning effect than that of Na. The bad performance of K-Mn/TiO2 may be due to its small surface area, high crystallinity, weak surface acidity, low content of Mn4+ and chemisorbed oxygen, and bad redox ability. The interpretation of the experimental results is supported by DFT calculations.

• 出版日期2014-10-30
• 单位上海电力大学