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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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原位漫反射傅里叶变换红外光谱研究锰铁基催化剂上低温选择性催化还原反应机理
DOI: 10.1016/S1872-2067(12)60730-X, PP. 294-301
Keywords: 氮氧化物,氨,锰铁基催化剂,低温选择性催化还原,原位漫反射傅里叶变换红外光谱
Abstract:
？采用自蔓延燃烧法制备了Ti0.9Mn0.05Fe0.05O2-δ催化剂，运用原位漫反射傅里叶变换红外光谱对该催化剂的NO和NH3稳态吸附以及NO和NH3瞬态反应进行了详细地分析与讨论.结果表明，相比于Lewis酸性位，150℃时Br？nsted酸性位吸附的NH3更具有SCR活性；与双齿硝酸盐和桥式硝酸盐相比，NO吸附产生的单齿硝酸盐是主要的中间物种；该SCR反应遵循Eley-Rideal和Langmuir-Hinshelwood机理，但以后者为主.另外，O2的存在有利于NO的氧化和配位态NH3的活化.
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