Effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 for propane dehydrogenation / Hui Liu in Industrial & engineering chemistry research, Vol. 48 N° 12 (Juin 2009)  

Effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 for propane dehydrogenation [texte imprimé] / Hui Liu, Auteur ; Zhou Yuming, Auteur ; Yiwei Zhang, Auteur . - 2009 . - pp. 5598–5603.
Chemical engineering
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 48 N° 12 (Juin 2009) . - pp. 5598–5603

Mots-clés :	PtSnNa/ZSM-5 catalyst Propane dehydrogenation BET surface area measurement
Résumé :	The effect of different preparation processes (impregnation and agglomeration) on the performance and properties of PtSnNa/ZSM-5 catalyst for propane dehydrogenation was studied. Some methods such as BET surface area measurement, catalyst particle mechanical strength, temperature-programmed desoption of ammonia (TPDA), Solid-state 27Al MAS NMR spectroscopy and temperature-programmed reduction of hydrogen (H2-TPR) were used to characterize the catalysts. The channel of ZSM-5 was hardly blocked after adding the binder despite the sequence of agglomeration and impregnation. Meanwhile the Pt metal dispersion on the preimpregnating catalyst with 5 wt % binder was the highest and the acidity was the weakest. The experimental results of propane dehydrogenation reaction showed that the preimpregnating catalyst with 5 wt % binder indicated the optimum reactivity in three catalysts. Therefore, the preimpregnating method in the case of adding a small amount binder was the optimal preparation method of the catalyst, which could replace the conventional preagglomerating method. Finally, a model for the effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 catalyst was proposed.
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie900311j