Low-temperature selective catalytic oxidation of ammonia over the CuO x /C-TiO2 catalyst

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• 作者：Hu Jingli ; Tang Xiaolong ; Yi Honghong ; Li Kai…
• 关键词：Carbon ; coated TiO2 (C ; TiO2) ; TiO2 ; Copper (Cu) ; Selective catalytic oxidation (SCO) ; Ammonia (NH3)
• 刊名：Research on Chemical Intermediates
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：41
• 期：8
• 页码：5743-5752
• 全文大小：835 KB
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• 作者单位：Hu Jingli (1)
  Tang Xiaolong (1) (2)
  Yi Honghong (1) (2)
  Li Kai (1)
  Sun Xin (1)
  
  1. College of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, People’s Republic of China
  2. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Physical Chemistry
  Inorganic Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1568-5675

文摘

Carbon-coated TiO2 (C-TiO2) was synthesized by nano-anatase powders and absolute alcohol with chemical vapor deposition method in nitrogen (N2) atmosphere. The CuO x /C-TiO2 composite was prepared as a catalyst for the selective catalytic oxidation (SCO) of ammonia (NH3) and demonstrated both high catalytic activity and low NO yield. Microstructures and properties of these materials were characterized by X-ray diffraction, transmission electron microscopy, and Raman spectra (Raman). The catalytic activity for NH3 oxidation was promoted by introducing carbon into TiO2. NH3 oxidation efficiencies of 44 and 74?% could be obtained at 175 and 200?°C, respectively, under a gas hourly space velocity of 76,000?h?. The CuO x /C-TiO2 composite was shown with higher catalytic activities than the CuO x /TiO2 catalyst because of the finer CuO x particles and CuO x species by the presence of the carbon layer. The C-TiO2 was a very favorable support for the SCO of NH3 at low temperature.