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The role of carbon nanospecies in deactivation of cobalt based catalysts in CH4and CO transformation

Elsevier Science & Technology
DOI: 10.1016/s0167-2991(07)80137-6


Abstract Deactivation of Pt10Co90 catalyst supported on Al2O3 and NaY in non-oxidativemethane transformation and CO disproportionation that may have importance in H2-deficient FT process was investigated in a constant flow system at 1023 K, 10 bar. Link can be found between deactivation of catalysts, especially of bimetallic Pt-Co nanoparticles and the formation, decomposition of meta-stabile CoCx (XRD) and formation of carbon nanotubes (TEM). The appearance of encapsulated Co particles inside the nanotubes (EDS) proves the restructuring of the Pt-Co bimetallic particles resulting in irreversible deactivation.

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