Mössbauer spectroscopy is an excellent in-situ technique for the identification of phases present in catalysts. Applied to metallic iron catalysts used in the Fischer-Tropsch reaction it reveals a detailed picture of the carburization process and provides insight into the relation between the properties of the catalytic material and its activity. The influence of a support and the effect of alloying iron with an (in)active metal on the catalytic performance is discussed for Fe, Cu---Fe and Ni---Fe systems. In addition, Mössbauer spectroscopy is used for the identification of "Co-sulfide" species present in sulfided Co and CoMo catalysts applied in one of the largest chemical processes in the world, the hydrotreatment of crude oil. A structural model is proposed. Finally, the contribution of Mössbauer spectroscopic studies to the development of a new catalyst for cleaning of Claus tail gas via selective oxidation of hydrogen sulfide to elemental sulfur is discussed.
|Number of pages||7|
|Journal||Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - 1993|
Kraan, van der, A. M., Boellaard, E., & Crajé, M. W. J. (1993). Characterization of catalysts by Moessbauer spectroscopy: an application to the study of Fischer-Tropsch, hydrotreating and super Claus catalysts. Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 76(1-4), 6-12. https://doi.org/10.1016/0168-583X(93)95112-I