| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 249.66 KB | Adobe PDF |
Orientador(es)
Resumo(s)
Mesoporous MCM-41 based materials containing various transition metals (Cr, Cu and V) were prepared hydrothermally and
characterized using various analytical and spectroscopic techniques. Cr and Cu are randomly anchored to the surface of MCM-41
support, while V is predominantly present as penta-valent species within the framework structure of the support. The catalytic activity
was tested in the wet air oxidation of aniline aqueous solutions (2 g/L) using a high-pressure reactor at 200 C with an oxygen
partial pressure of 6.9 bar. Among the prepared materials, (Cu)MCM-41 showed a significant catalytic activity with an aniline
conversion after 2 h of 96% and a selectivity towards CO2 formation of 76%. Although some leaching of the Cu was observed,
the catalyst showed a good performance and stability after re-use in at least three consecutive cycles.
Descrição
Palavras-chave
Aniline Catalytic wet air oxidation (CWAO) (Cu)MCM-41 Mesoporous molecular sieves
Contexto Educativo
Citação
Gomes, Helder; Selvam, Parasuraman; Dapurkar, Sudhir; Figueiredo, José; Faria, Joaquim (2005). Transition metal (Cu, Cr, and V) modified MCM-41 for the catalytic wet air oxidation of aniline. Microporous and Mesoporous Materials. ISSN 1387-1811. 86:1-3, p. 287-294
Editora
Elsevier