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Differential thermal analysis of a zeolite Y crystalline structure in a catalyst

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Abstract

The purpose of this work was to employ the differential thermal analysis (DTA) technique to compare variations in the collapse energy of the zeolite Y crystalline structure in a fresh catalyst and in the same catalyst impregnated with nickel and vanadium. A small exothermic signal in the DTA curve at 950–1150 °C indicated the collapse of the crystalline structure. The areas of the exothermic signals in the DTA curves of the two samples indicated a reduction in the curve of the metal impregnated catalyst. These results were compared with X-ray data, leading to the conclusion that metal impregnation affects the zeolite Y crystalline structure and that the DTA technique is a potentially useful tool for measuring the integrity of zeolite Y in catalysts.

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Acknowledgements

The authors thank CNPq/PROSET (Conselho Nacional de Desenvolvimento Científico e Tecnológico/Programa Setorial de Petróleo) and PETROBRAS (Brazilian Oil Company).

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Authors and Affiliations

  1. Chemistry Institute, Universidade Federal Fluminense, Outeiro de São João Batista, s/n, Centro, Niterói, RJ, 24020-150, Brazil

    Maria Luisa A. Gonçalves & Meri D. Vieira

  2. Pos Graduation Program in Chemistry, Universidade Federal Fluminense, Outeiro de São João Batista, s/n, Centro, Niterói, RJ, 24020-150, Brazil

    Deusa Angélica P. Mota, Wildson V. Cerqueira & Ana Maria R. F. Teixeira

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  1. Maria Luisa A. Gonçalves
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  2. Meri D. Vieira
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Correspondence to Maria Luisa A. Gonçalves.

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Gonçalves, M.L.A., Vieira, M.D., Mota, D.A.P. et al. Differential thermal analysis of a zeolite Y crystalline structure in a catalyst. J Therm Anal Calorim 101, 965–971 (2010). https://doi.org/10.1007/s10973-009-0631-1

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  • DOI: https://doi.org/10.1007/s10973-009-0631-1

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