Design of low-temperature Pt-carbon combustion catalysts for VOC's treatments

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

morales-torres, s (Autor) FEUP; maldonado-hodar, fj (Autor) Outra; perez-cadenas, af (Autor) Outra; carrasco-marin, f (Autor) Outra

Revista

Título: Journal of Hazardous Materials

Vol. 183

Páginas: 814-822

ISSN: 0304-3894

Editora: Elsevier

Indexação

ISI Web of Knowledge - 35 Citações

Scopus - 32 Citações

Outras Informações

ID Authenticus: P-008-PHV

DOI: 10.1016/j.jhazmat.2010.07.100

Abstract (EN): Two series of Pt/C-catalysts were prepared using pure carbon aerogels as supports. The influence of porosity, surface chemistry and Pt dispersion on the activity of Pt/C combustion catalysts was analyzed. The synthesis of the supports was fitted to have a monomodal pore size distribution in the meso and macropore range respectively. Both supports were functionalized by oxidation treatment with H(2)O(2) or (NH(4))(2)S(2)O(8). These treatments did not modify the porosity significantly, but the surface chemistry changed from basic to acid as oxygen content increased. In this way, Pt-dispersion decreased as a result of the low thermal stability of surface carboxylic acid groups. Benzene was selected as target VOCs and the catalytic combustion performance depended mainly on the porous texture and Pt-dispersion, while the variations in the surface chemistry of carbon supports due to oxidation treatments seemed to have a weak influence on this kind of reaction.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9