Manganese oxide catalysts synthesized by exotemplating for the total oxidation of ethanol

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

S. S. T. Bastos (Autor) FEUP; J. J. M. Orfão (Autor) FEUP; M. M. A. Freitas (Autor) FEUP; M. F. R. Pereira (Autor) FEUP; J. L. Figueiredo (Autor) FEUP

Revista

Título: Applied Catalysis B: Environmental

Vol. 93

Páginas: 30-37

ISSN: 0926-3373

Editora: Elsevier

Indexação

ISI Web of Knowledge - 69 Citações

ISI Web of Science

Scopus - 94 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: P-003-E9S

DOI: 10.1016/j.apcatb.2009.09.009

Abstract (EN): Manganese oxides were synthesized by exotemplating using an activated carbon and a carbon xerogel as templates. The template effect and the impregnation method were studied. Up to a seven fold increase in the surface area was obtained for the materials prepared by exotemplating when compared to the standard calcination method. The catalytic performance of these manganese oxide materials was assessed in the total oxidation of ethanol. The catalytic activity was found to be mainly dependent on the manganese oxidation state and to a lower extent on the surface area. The best catalysts were able to oxidize ethanol into 100% of CO(2) at 240 degrees C. Experiments without oxygen in the feed suggest that the lattice oxygen can react with ethanol and is involved in the ethanol oxidation mechanism. There is a strong correlation between the catalytic activity and the lattice oxygen donating ability, which depends on the oxidation state of manganese and the surface area.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8