Quantification of Acid Sites in H-ZSM-5, H-, and H-Y Zeolites
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The effect of sodium poisoning on the activity for n-hexane cracking over H-ZSM-5, H-, and dealuminated H-Y zeolites was compared with spectroscopic changes in the region of the stretching vibration of the surface hydroxyls. For all zeolites, there was a high correlation between the n-hexane cracking activity and the intensity of the IR bands assigned to strongly acidic hydroxyl bands. The lethal sodium doses for H- and H-ZSM-5 indicate that about 80% of the framework aluminum of these zeolites gives rise to catalytically active sites. For the dealuminated H-Y sample, only 15% of the framework aluminum results in catalytically active sites. 1999 Academic Press.
author list (cited authors)
Kotrel, S., Rosynek, M. P., & Lunsford, J. H.
complete list of authors
Kotrel, Stefan||Rosynek, Michael P||Lunsford, Jack H