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The Characterization of Hydrocarbon Intermediates in H-ZSM-5

Published online by Cambridge University Press:  28 February 2011

T. J. Gricus Kofke ,
R. J. Gorte  and
W. E. Farneth
T. J. Gricus Kofke
Affiliation:
Department of Chemical Engineering, University of Pennsylvania, Philadelphia, PA 19104
R. J. Gorte
Affiliation:
Department of Chemical Engineering, University of Pennsylvania, Philadelphia, PA 19104
W. E. Farneth
Affiliation:
E. I. DuPont de Nemours and Comp., Central Research and Development, Wilmington, DE 19898
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Abstract

We have examined the adsorption of simple alcohols and 2-propanamine on H-ZSM-5 zeolites with Si/Al2 ratios between 38 and 520. Thermogravimetric analysis (TGA) demonstrated that most of the molecules display a clearly defined adsorption state corresponding to a coverage of one molecule per Al site. Temperature programmed desorption (TPD) and transmission infrared spectroscopy results for each of the molecules in this 1:1 adsorption state are consistent with adsorption being due to the transfer of a proton from the zeolite to the adsorbed molecule. These results provide additional evidence that carefully prepared H-ZSM-5 is a Bronsted acid, with one acid site per framework Al atom, in which all of the acid sites are identical in strength.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 431
Copyright
Copyright © Materials Research Society 1988

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References

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