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Stability and separation of phases in Pd and Fe exchanged NaX and NaZSM-5 catalysts in Co+H2 reaction

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Abstract

Pd and Fe exchanged NaX and NaZSM-5 catalysts (Pd/Fe=5) were studied. The components formed in the course of hydrogen activation at 720 K and their transformations taking place during treatments in CO+H2 at 570 and 500 K are described. PdxFe, Fe2+ ions in octahedral and tetrahedral environments and x-iron carbide components are identified. The bimetallic component is not affected by the CO+H2 treatment. The Fe2+ ions located only in tetrahedral environment were transformed into iron carbide in the X zeolite framework, while the Fe2+ ions of octahedral environment were also transformed in part to carbide in the ZSM-5 lattice.

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Authors and Affiliations

  1. Institute of Isotopes, P.O.B. 77, H-1525, Budapest, Hungary

    K. Lázár & L. Guczi

  2. Regional Research Laboratory, 500 009, Hyderabad, India

    B. M. Choudary

Authors
  1. K. Lázár
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  2. B. M. Choudary
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  3. L. Guczi
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Lázár, K., Choudary, B.M. & Guczi, L. Stability and separation of phases in Pd and Fe exchanged NaX and NaZSM-5 catalysts in Co+H2 reaction. Hyperfine Interact 46, 591–597 (1989). https://doi.org/10.1007/BF02398247

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  • DOI: https://doi.org/10.1007/BF02398247

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