Influence of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation / Lihui Wan in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011)  

Influence of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation [texte imprimé] / Lihui Wan, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur . - 2011 . - pp. 4280–4285.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4280–4285

Mots-clés :	Catalytic properties
Résumé :	The effect of lanthanum addition on catalytic properties of PtSnK/Al2O3 catalyst for isobutane dehydrogenation was investigated. The catalysts were characterized by nitrogen adsorption, H2 chemisorption, XRF, XRD, XPS, TG, TPO, and NH3-TPD. Results showed that with the appropriate addition of lanthanum, the platinum dispersion increased, and carbon depositions decreased. The presence of La in the PtSnK/Al2O3 catalysts could not only strengthen the Sn−Al2O3 interaction, but also stabilize the oxidation states of Sn species, thus increasing the reaction activity and stability. Among the catalysts investigated, PtSnKLa(0.9 wt %)/Al2O3 had the best catalytic performance. After reaction for 8 h, the isobutane conversion of 49% was achieved with the corresponding isobutene selectivity of higher than 95%.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie1023518