Data di Pubblicazione:
2014
Citazione:
Fischer–Tropsch synthesis : EXAFS study of Ru and Pt bimetallic Co based catalysts / C. Pirola, M. Scavini, F. Galli, S. Vitali, A. Comazzi, F. Manenti, P. Ghigna. - In: FUEL. - ISSN 0016-2361. - 132(2014), pp. 62-70. [Epub ahead of print]
Abstract:
Co/Ru and Co/Pt bimetallic catalysts supported on silica prepared by successive impregnation were characterized,
in particular with EXAFS spectroscopy, and tested in Fischer Tropsch synthesis reaction. Both
the CO conversion and the total yield towards desired products were tripled thanks to the action of
low amount (0.5 wt%) of noble metal. Different interactions of the two noble metals with cobalt in bimetallic
catalysts (BMCs) were demonstrated by EXAFS. Ru1 yCoy solid solutions with hexagonal close
packed structure form were identified with y in the 0.1–0.23 range for all the concentration of noble
metal. In the Co/Pt BMCs the structure of Pt containing phase is strongly dependent on Pt amount. Co
and Pt form the intermetallic compound PtCo for low Pt amount (0.1%) with a face centered tetragonal
structure. Differently for the sample with higher loading of Pt (2%) the EXAFS spectrum could be fitted
using the a structural model derived from the close packed cubic structure of Pt
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Cobalt; EXAFS; Fischer Tropsch; Platinum; Ruthenium
Elenco autori:
C. Pirola, M. Scavini, F. Galli, S. Vitali, A. Comazzi, F. Manenti, P. Ghigna
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