Catalytic properties of carbon materials for wet oxidation of aniline

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

Authors

Helder T. Gomes (Author) Other; Bruno F. Machado (Author) Other; Andreia Ribeiro (Author) Other; Ivo Moreira (Author) Other; Márcio Rosário (Author) Other; Adrián M. T. Silva (Author) FEUP; José L. Figueiredo (Author) FEUP; Joaquim L. Faria (Author) FEUP

Journal

Title: Journal of Hazardous Materials

Vol. 159

Pages: 420-426

ISSN: 0304-3894

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 93 Citations

ISI Web of Science

Scopus - 114 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences

Other information

Authenticus ID: P-003-TTF

DOI: 10.1016/j.jhazmat.2008.02.070

Abstract (EN): A mesoporous carbon xerogel with a significant amount of oxygen functional groups and a commercial activated carbon, were tested in the catalytic wet air oxidation of aniline at 200 degrees C and 6.9 bar of oxygen partial pressure. Both carbon materials showed high activity in aniline and total organic carbon removal, a clear increase in the removal efficiency relatively to non-catalytic wet air oxidation being observed. The best results in terms of aniline removal were obtained with carbon xerogel, an almost complete aniline conversion after 1 h oxidation with high selectivity to non-organic compounds being achieved. The materials were characterized by thermogravimetric analysis, temperature programmed desorption, N(2) adsorption and scanning electron microscopy, in order to relate their performances to the chemical and textural characteristics. It was concluded that the removal efficiency, attributed to both adsorption and catalytic activity, is related to the mesoporous character of the materials and to the presence of specific oxygen containing functional groups at their surface. The effect of catalytic activity was found to be more important in the removal of aniline than the effect of adsorption at the materials surface. The results obtained indicate that mesoporous carbon xerogels are promising catalysts for CWAO processes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7