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Quantitative determination of Ni and V in FCC catalysts monitored by ESR spectroscopy

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Abstract

Calibration mixtures containing Ni0 and V4+ in the range from 500 to 4000 ppm have been prepared using various supports (silica, alumina, titania and ultrastable Y zeolite (USY)) with different particle sizes. ESR measurements revealed a linear relation between the impregnated metal amounts and the registered ESR signal integrals and/or intensities, suitable for the determination of the NiO (reduced to Ni0) and V4+ contents in FCC catalysts, respectively. The amount of NiO in a FCC equilibrium catalyst was determined to about 1300 ppm of a total of 2500 ppm Ni compound present in this sample, whereas the amount of V4+ was estimated to about 1800 ppm of a total of 2800 ppm vanadium species. Hence, this catalyst contains about 1000 ppm V5+.

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Authors and Affiliations

  1. SINTEF Applied Chemistry, PO Box 124, Blindern, N‐0314 Oslo, Norway

    Michael Stöcker & Elisabeth Tangstad

  2. Statoil R&D, Postuttak, N‐7005, Trondheim, Norway

    Nina Aas & Trond Myrstad

Authors
  1. Michael Stöcker
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  2. Elisabeth Tangstad
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  3. Nina Aas
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  4. Trond Myrstad
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Stöcker, M., Tangstad, E., Aas, N. et al. Quantitative determination of Ni and V in FCC catalysts monitored by ESR spectroscopy. Catalysis Letters 69, 223–229 (2000). https://doi.org/10.1023/A:1019094611940

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