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Issue 9, 1988
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Monitoring cation-site occupancy of nickel-exchanged zeolite Y catalysts by high-temperature in situ X-ray powder diffractometry

Abstract

Procedures based on the Rietveld method of refinement of X-ray powder profiles have been used to determine the sites and occupancies of extra-framework cationic nickel, potassium and sodium in typical zeolitic catalysts at temperatures in the range 400–500 °C. The siting of Ni2+ and other ions at high temperature differs from that at room temperature previously reported. There are also significant differences in the location of cations and in the reducibility of Ni2+ which depend upon the nature of the treatment (e.g. steam treatment, treatment with an alkaline solution) to which the as-prepared zeolite is subjected prior to dehydration and/or reduction.

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Article information


J. Chem. Soc., Faraday Trans. 1, 1988,84, 2915-2931
Article type
Paper

Monitoring cation-site occupancy of nickel-exchanged zeolite Y catalysts by high-temperature in situ X-ray powder diffractometry

J. M. Thomas, C. Williams and T. Rayment, J. Chem. Soc., Faraday Trans. 1, 1988, 84, 2915
DOI: 10.1039/F19888402915

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