Fulltext

Hydrothermally Stable WO3/ZrO2-Ce0.6Zr0.4O2 Catalyst for the Selective Catalytic Reduction of NO with NH3

Baidya, Tinku ; Bernhard, Andreas ; Elsener, Martin ; Kröcher, Oliver

In: Topics in Catalysis, 2013, vol. 56, no. 1-8, p. 23-28

Aggiungi alla tua lista
    Titre
    • Hydrothermally Stable WO3/ZrO2-Ce0.6Zr0.4O2 Catalyst for the Selective Catalytic Reduction of NO with NH3
    Auteur
    • Baidya, Tinku. Paul Scherrer Institut, OVGA/112, 5232, Villigen PSI, Switzerland
    • Bernhard, Andreas. Paul Scherrer Institut, OVGA/112, 5232, Villigen PSI, Switzerland
    • Elsener, Martin. Paul Scherrer Institut, OVGA/112, 5232, Villigen PSI, Switzerland
    • Kröcher, Oliver. Paul Scherrer Institut, OVGA/112, 5232, Villigen PSI, Switzerland
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Topics in Catalysis, 2013, vol. 56, no. 1-8, p. 23-28. Springer US; http://www.springer-ny.com
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:310118
    Summary
    A new catalyst WO3/ZrO2-Ce0.6Zr0.4O2 (15 wt% WO3/ZrO2:Ce0.6Zr0.4O2=50:50) has been developed for the selective catalytic reduction of NO with NH3. The redox component Ce0.6Zr0.4O2 was dispersed on the surface of acidic WO3/ZrO2 by the solution combustion method showing the best NO x reduction efficiency among the catalysts prepared by various modes of mixing of the components. The catalyst has been characterized by XRD, Raman spectroscopy and NH3-TPD. A NO x reduction efficiency of more than 90% was obtained between 300 and 500°C at α=NH3,in/NO x,in=1. The catalyst showed stable NO x reduction efficiency after hydrothermal ageing at 700°C. Sulfur poisoning promoted the NO x reduction efficiency at high temperatures at the expense of a reduced activity at lower temperatures, but the catalyst could be fully regenerated by heating in O2 at 650°C