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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

1) Ison, A. and Gorte, R.J., J. Catal. 89, 150 (1984).Google Scholar
2) Grady, M.C. and Gorte, R.J., J. Phys. Chem. 89, 1305 (1984).CrossRefGoogle Scholar
3) Aronson, M.T., Gorte, R.J., and Farneth, W.E., J. Catal. 98, 434 (1986).CrossRefGoogle Scholar
4) Aronson, M.T., Gorte, R.J., and Farneth, W.E., J. Catal. 105, 455 (1987).Google Scholar
5) Farneth, W.E., Roe, D.C., Kofke, T.J. Gricus, Tabak, C.J., and Gorte, R.J., Langmuir, in press.Google Scholar
6) Morrow, B.A., Thompson, L.W., and Wetmore, R.W., J. Catal. 23, 334 (1973).Google Scholar
7) Aronson, M.T., PhD Thesis, University of Pennsylvania (1987).Google Scholar