Ethanol auto-thermal reforming on rhodium catalysts and initial steps simulation on single crystals under UHV conditions (Articolo in rivista)

Type
Label
  • Ethanol auto-thermal reforming on rhodium catalysts and initial steps simulation on single crystals under UHV conditions (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.apcata.2004.11.020 (literal)
Alternative label
  • E. Vesselli; G. Comelli; R. Rosei; S. FRENI; F. Frusteri; S. Cavallaro (2005)
    Ethanol auto-thermal reforming on rhodium catalysts and initial steps simulation on single crystals under UHV conditions
    in Applied catalysis. A, General (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • E. Vesselli; G. Comelli; R. Rosei; S. FRENI; F. Frusteri; S. Cavallaro (literal)
Pagina inizio
  • 139 (literal)
Pagina fine
  • 147 (literal)
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  • 281 (literal)
Rivista
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  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Physics Department and Center of Excellence for Nanostructured Materials, Universita` di Trieste, via A. Valerio 2, 34127 Trieste, Italy Laboratorio Nazionale TASC-INFM, Area Science Park, S.S. 14 km 163.5, 34012 Basovizza (Trieste), Italy Istituto CNR ''Tecnologie avanzate per l'Energia'', Via Salita S. Lucia sopra Contesse 39, 98126 Messina, Italy Dipartimento di Chimica Industriale e Ingegneria dei Materiali dell'Universita`, P.O. Box 29, 98166 S. Agata di Messina, Italy (literal)
Titolo
  • Ethanol auto-thermal reforming on rhodium catalysts and initial steps simulation on single crystals under UHV conditions (literal)
Abstract
  • By means of ultra high vacuum temperature programmed desorption experiments, we studied the influence of oxygen on the decomposition of ethanol over rhodium(1 1 1) and (1 0 0) single crystal surfaces. Oxygen at low surface coverage (between 0.1 and 0.25 ML) promotes ethanol decomposition and the formation of carbon dioxide, while carbon monoxide production is not significantly affected, with respect to the reaction on clean samples. Oxygen coverage above 0.25 ML hinders hydrogen formation due to the prevalent oxidising action, which leads to water formation. These results are in line with data we obtained for ethanol decomposition over a 5% Rh/Al2O3 catalyst under typical reforming working conditions (i.e. T = 923 K and P = 1 bar), thus indicating that an oxidising environment is required in order to avoid carbon poisoning and to promote C2-containing molecules decomposition. On the contrary, excess of oxygen leads to a strong reduction of hydrogen concentration in the reaction products. (literal)
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