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

• Type: Article in International Scientific Journal
• Date: 2010

Authors

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

Journal

Title: Journal of Hazardous Materials

Vol. 183

Pages: 814-822

ISSN: 0304-3894

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 35 Citations

Scopus - 32 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9