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Investigation of HNCO adsorption and hydrolysis on Fe-ZSM5

Piazzesi, Gaia ; Nicosia, Daniele ; Devadas, Mukundan ; Kröcher, Oliver ; Elsener, Martin ; Wokaun, Alexander

In: Catalysis Letters, 2007, vol. 115, no. 1-2, p. 33-39

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    Titre
    • Investigation of HNCO adsorption and hydrolysis on Fe-ZSM5
    Auteur
    • Piazzesi, Gaia. Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
    • Nicosia, Daniele. Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
    • Devadas, Mukundan. Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
    • Kröcher, Oliver. Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
    • Elsener, Martin. Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
    • Wokaun, Alexander. Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Catalysis Letters, 2007, vol. 115, no. 1-2, p. 33-39. Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:311260
    Summary
    The adsorption of HNCO on Fe-ZSM5 was investigated in detail by DRIFT spectroscopy and compared to the adsorption on H-ZSM5, Al2O3, SiO2, Fe2O3/Al2O3 and Fe2O3/SiO2. At 150°C, HNCO adsorbs dissociatively on Fe-ZSM5 producing principally isocyanate species (-NCO) adsorbed on Al and Fe sites. In the presence of water the hydrolysis of the -NCO groups to NH3 was observed. Comparison of the DRIFT results with measurements of the catalytic activity of coated cordierite monoliths suggests that -NCO groups are likely intermediate species in the hydrolysis of HNCO over Fe-ZSM5