A novel ceria-activated carbon composite for the catalytic ozonation of carboxylic acids

• Type: Article in International Scientific Journal
• Date: 2008

Authors

P. C. C. Faria (Author) FEUP; J. J. M. Órfão (Author) FEUP; M. F. R. Pereira (Author) FEUP

Journal

Title: Catalysis Communications

Vol. 9

Pages: 2121-2126

ISSN: 1566-7367

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 76 Citations

ISI Web of Science

Scopus - 106 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Other information

Authenticus ID: P-003-YEV

DOI: 10.1016/j.catcom.2008.04.009

Abstract (EN): Ceria (Ce-O) and a novel ceria-activated carbon composite (ACO-Ce-O) were prepared and tested as catalysts in the ozonation of two selected carboxylic acids, oxalic acid and oxamic acid, at acid pH. Ce-O showed an interesting catalytic effect, especially in the ozonation of oxalic acid. A strong synergic effect was observed for the ACO-Ce-O composite in the case of oxalic acid, leading to the best results in the mineralization of this compound. Both materials enhanced the removal of oxamic acid relatively to single ozonation. The Ce-O catalytic ozonation was shown to comprise bulk oxidation reactions occurring via HO center dot radicals. In the case of the composite, both surface and bulk reactions are supposed to occur. Some considerations about the mechanisms are presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6