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Highly efficient Fe-silicalite zeolite in direct propane ammoxidation with N2O and O-2

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Perez-Ramirez, J Blangenois, Nathalie [UCL] Ruiz, Patricio [UCL]

A novel process for the direct ammoxidation of propane over steam-activated Fe-silicalite at 723-823 K is reported. Yields of acrylonitrile (ACN) and acetonitrile (AcCN) below 5% were obtained using N2O or O-2 as the oxidant. Co-feeding N2O and O-2 boosts the performance of Fe-silicalite compared to the individual oxidants, leading to AcCN yields of 14% and ACN yields of 11% (propane conversions of 40% and products selectivity of 25-30%). The beneficial effect of O-2 on the propane ammoxidation with N2O contrasts with other N2O-mediated selective oxidations over iron-containing zeolites (e.g. hydroxylation of benzene and oxidative dehydrogenation of propane), where a small amount of O-2 in the feed dramatically reduces the selectivity to the desired product. It is shown that the productivity of ACN and especially AcCN, expressed as mol product h(-1) kg(cat)(-1) , is significantly higher over Fe-silicalite than over active propane ammoxidation catalysts reported in the literature. Our results open new perspectives to improve the performance of alkane ammoxidation catalysts.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2005
Language Anglais
Journal information "Catalysis Letters" - Vol. 104, no. 3-4, p. 163-167 (2005)
Peer reviewed yes
Publisher Springer (New York)
issn 1011-372X
e-issn 1572-879X
Publication status Publié
Affiliation UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries
Keywords propane ; ammoxidation ; iron zeolites ; N2O ; O-2 ; acrylonitrile ; acetonitrile
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Bibliographic reference Perez-Ramirez, J ; Blangenois, Nathalie ; Ruiz, Patricio. Highly efficient Fe-silicalite zeolite in direct propane ammoxidation with N2O and O-2. In: Catalysis Letters, Vol. 104, no. 3-4, p. 163-167 (2005)
Permanent URL http://hdl.handle.net/2078.1/39050