The effect of sulfidation on the Ni distribution in Ni/USY zeolites

B. Pawelec, J.L.G. Fierro, J.F. Cambra, P.L. Arias, J.A. Legarreta, G. Vorbeck, J.W. Haan, de, V.H.J. Beer, de, R.A. Santen, van

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)
57 Downloads (Pure)


NI/USY zeolite catalysts have been prepared by either an ion- exchange or an impregnation procedure. The modification of support and the effect of sulfidation on the Ni distribution were examined by various techniques (water adsorption, FT i.r. spectroscopy of chemisorbed NO, XPS, Xe-129 n.m.r. and Xe adsorption). in all catalysts the sulfidation of Ni is incomplete and the method of Ni introduction influenced the Ni distribution in Ni/USY zeolites. In unsulfided samples ion- exchange technique led to Ni located essentially in hexagonal prisms, whereas in the other samples prepared by impregnation procedure the Ni concentrates were located at or near the outer zeolite surface. Some nickel redistribution has been observed during catalyst sulfidation. (C) Elsevier Science Inc. 1997
Original languageEnglish
Pages (from-to)250-259
Issue number4
Publication statusPublished - 1997


Dive into the research topics of 'The effect of sulfidation on the Ni distribution in Ni/USY zeolites'. Together they form a unique fingerprint.

Cite this