Novel promoting effect of acid modification on selective catalytic reduction of NO with ammonia over CeO2 catalyst

作者：Zhang, Qiulin; Song, Zhongxian; Ning, Ping^*; Liu, Xin; Li, Hao; Gu, Junjie

来源：Catalysis Communications, 2015, 59: 170-174.

DOI：10.1016/j.catcom.2014.10.007

• CeO2
• Acid sites
• Modification
• Bronsted

A series of acid modified CeO2 catalysts were prepared and used for selective catalytic reduction (SCR) of NO with NH3. The results showed that the SCR activity of pure CeO2 was greatly enhanced by the modification of acid. The CeO2 modified by 20% phosphotungstic acid ekhibited the best NO conversion in a wide temperature range of 150-550 degrees C. The SCR activity was slightly influenced by SO2 and H2O, while such effect was reversible. The improvement of SCR activity and N-2 selectivity over CeO2 catalyst modified by acid was attributed to the enhanced amount and intensity of Bronsted or Lewis acid sites.

• 出版日期2015-1-10
• 单位昆明理工大学