Catalytic properties of carbon materials for wet oxidation of aniline

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

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

Revista

Título: Journal of Hazardous Materials

Vol. 159

Páginas: 420-426

ISSN: 0304-3894

Editora: Elsevier

Indexação

ISI Web of Knowledge - 93 Citações

ISI Web of Science

Scopus - 114 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7