Effects of Added CO2 and H2 on the Direct Decomposition of NO over BaMnO3-Based Perovskite Oxide

DOI PDF 被引用文献5件 参考文献33件
  • Hideharu Iwakuni
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • Yusuke Shinmyou
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • Hiroaki Yano
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • Kazuya Goto
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • Hiroshige Matsumoto
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • Tatsumi Ishihara
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University

書誌事項

公開日
2008-09
権利情報
  • https://academic.oup.com/pages/standard-publication-reuse-rights
DOI
  • 10.1246/bcsj.81.1175
公開者
Oxford University Press (OUP)

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<jats:title>Abstract</jats:title> <jats:p>N2 yield on Ba0.8La0.2Mn0.8Mg0.2O3 decreased from 70% to 30% on the addition of 1% CO2, which is a much larger negative effect than that seen with O2. The CO2 negative effects are not permanent and this may result from the inhibition of NO adsorption. Co-feeding of H2 as a reductant is effective for increasing NO conversion. This suggests that the catalyst surface was covered with strongly adsorbed nitrate or nitride species which formed by adsorption of NO on oxygen formed by the decomposition of NO, and the removal of this surface species might be the most important step for the NO decomposition reaction. Co-feeding of H2 is also effective for increasing the NO decomposition activity in the presence of CO2. The reaction mechanism was studied by IR measurements which also revealed that the surface of the catalyst was covered with strongly bound nitrate species (NO3−). The addition of H2 to the reaction mixture is effective for NO3− removal and so accelerates the NO decomposition under coexistence of CO2.</jats:p>

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