Pt-KL zeolite catalysts of different preparation. Part I. Catalyst characterization

I. Manninger, Z. Paál, B. Tesche, U. Klengler, J. Halász, I. Kiricsi

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Abstract

0.8% Pt on KL zeolite was prepared by reduction with H2 and NaBH4. Transmission electron microscopy and X-ray diffraction were used for characterization of morphology of the metal particles; acidity of the zeolite framework was measured with IR spectra of adsorbed pyridine. Reduction by NaBHP4 produced rather large, needle-like Pt crystallites on the outer surface of zeolite grains which contained very little acidity. Subsequent hydrogen treatment brought about their severe sintering; at the same time, small crystallites appeared. A bimodal distribution was seen when the catalyst was reduced with hydrogen; this sample exhibited appreciable acidity. X-ray diffraction data showed the presence of Pt particles above noise level in the case of borohydride-reduced catalyst only, in agreement with EM data.

Original languageEnglish
Pages (from-to)361-372
Number of pages12
JournalJournal of Molecular Catalysis
Volume64
Issue number3
DOIs
Publication statusPublished - Feb 1 1991

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Acidity
Crystallites
Catalysts
X ray diffraction
Hydrogen
Needles
Pyridine
Sintering
Transmission electron microscopy
Metals

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Pt-KL zeolite catalysts of different preparation. Part I. Catalyst characterization. / Manninger, I.; Paál, Z.; Tesche, B.; Klengler, U.; Halász, J.; Kiricsi, I.

In: Journal of Molecular Catalysis, Vol. 64, No. 3, 01.02.1991, p. 361-372.

Research output: Contribution to journalArticle

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AU - Manninger, I.

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AU - Tesche, B.

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AU - Halász, J.

AU - Kiricsi, I.

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