A Remarkable Catalyst Combination to Widen the Operating Temperature Window of the Selective Catalytic Reduction of NO by NH3. Issue 8 (2nd July 2014)

• Record Type: Journal Article
• Authors: Zhang, Runduo; Liu, Ning; Luo, Zhen; Yang, Wei; Liang, Xin; Xu, Ruinian; Chen, Biaohua; Duprez, Daniel; Royer, Sébastien
• Is Part Of: ChemCatChem. Volume 6:Issue 8(2014:Aug.)
• Page Start: 2263
• Page End: 2269
• Publication Date: 2014-07-02
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201402172
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>On the basis of the idea of combining high selective catalytic reduction (SCR) activity, high N₂ selectivity, and broad operating temperature window, we developed a combined catalyst process that was found to be a convenient way to design a highly efficient SCR process for NO with NH₃. The single catalysts of MnO_{<italic>x</italic>}–CeO₂/TiO₂ and V₂O₅–WO₃/TiO₂ as well as combined catalysts with different configurations were fully characterized by XRD, temperature‐programmed reduction of H₂, and temperature‐programmed desorption of NO/O₂. In addition, they were tested for the oxidation of NO or NH₃ as well as the SCR of NO with NH₃. The correlations between combining configurations and SCR activity results were also revealed. Furthermore, fundamental evidences were given for the rational design of the process and its efficiency maximization (assembly order and catalytic bed volume). An adequate configuration, with MnO_{<italic>x</italic>}–CeO₂/TiO₂ and V₂O₅–WO₃/TiO₂ active materials, ensures an excellent SCR performance (NO conversion &gt;85 %, N₂ yield &gt;70 %, and decreased N₂O production) over a wide operating temperature window (from 150 to 400 °C).</p> </abstract>