Impact of the surface heterogeneity of commercial V₂O₅–WO₃/TiO₂ catalysts on the NH₃–SCR–DeNO _x reaction by kinetic modelling

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• 作者：Xinhua Xie ; Erich Hums ; Jidong Lu
• 关键词：SCR ; V2O5–WO3/TiO2 catalyst ; Kinetic modelling ; Surface heterogeneity ; Surface elementary steps
• 刊名：Research on Chemical Intermediates
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：43
• 期：3
• 页码：1409-1428
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Physical Chemistry; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1568-5675
• 卷排序：43

文摘

The impact of the surface heterogeneity of two commercial V₂O₅–WO₃/TiO₂ catalysts on the NH₃–SCR–DeNO_x process was investigated by kinetic modelling of the surface elementary steps. It was demonstrated that transient kinetic is sufficiently qualified to investigate the heterogeneity of catalytic active sites. In this context, possible deviations of the Langmuir adsorption isotherm formula were analyzed which still show a satisfactory deviation at temperatures below 623 K whereas the deviation increases rapidly at T > 623 K.