論文

査読有り
2019年

Low-temperature NH3-SCR Activity of Nanoparticulate Gold Supported on a Metal Oxide

JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
  • Yusuke Inomata
  • ,
  • Makoto Mino
  • ,
  • Shinichi Hata
  • ,
  • Eiji Kiyonaga
  • ,
  • Keiichiro Morita
  • ,
  • Kenji Hikino
  • ,
  • Kazuhiro Yoshida
  • ,
  • Masatake Haruta
  • ,
  • Toru Murayama

62
5
開始ページ
234
終了ページ
243
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1627/jpi.62.234
出版者・発行元
JAPAN PETROLEUM INST

Nitrogen oxide (NOx) is the main pollutant produced from power plants and boiler. The development of catalysts that can work to reduce NOx under ambient conditions at a low reaction temperature has been required. In this work, we examined the NH3-selective catalytic reduction (SCR) activity of metal oxide-supported gold catalysts in order to develop NH3-SCR catalysts working at low temperatures ( < 200 degrees C). Au/CuO showed NH3-SCR activity at 100 degrees C (NO conversion = 20 %, N-2 selectivity = ca. 100 %), though the production of N2O as a by-product caused by NH3 oxidation was observed at a higher reaction temperature. We found that deposition of 0.1 wt% of gold on CuO is sufficient for NH3-SCR to proceed and that NH3 oxidation proceeds with increase in the loading amount of gold (< 0.5 %) at a high reaction temperature. Although we measured the NH3-SCR activities of Pt/CuO and Pd/CuO, Au/CuO showed better activity than those of other precious metal catalysts. We also tested binary metal oxide-supported gold catalysts and found that 1 wt%Au/10 wt%CuO/Al2O3 showed the largest N-2 yield (45 %) owing to the introduction of other metal oxide species to CuO. The results indicated that a gold catalyst has the potential to catalyze NH3-SCR at low temperatures.


リンク情報
DOI
https://doi.org/10.1627/jpi.62.234
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000493072100006&DestApp=WOS_CPL

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