Catalytic wet air oxidation of aniline on transition metal modified MCM-41 cata...

• Autor(es): Gomes, Helder ; Selvam, Parasuraman ; Dapurkar, Sudhir ; Figueiredo, José ; Faria, Joaquim
• Data: 2005
• Identificador Persistente: http://hdl.handle.net/10198/1327
• Origem: Biblioteca Digital do IPB
• Assunto(s): Aniline; Catalytic wet air oxidation; (Cu)MCM-41; Mesoporous molecular sieves
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

Transition metal (Cu, Cr and V) MCM-41 catalysts were prepared hydrothermally and characterized by X-ray diffraction (XRD), scanning electron microscopy/energy dispersive X-ray (SEM/EDX), inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and N2 adsorption-desorption analysis at -196ºC. The catalysts were tested in the catalytic wet air oxidation (CWAO) of aniline aqueous solutions at 200ºC and 6.9 bar of oxygen partial pressure. The (Cu)MCM-41 catalyst showed the best performance with respect to combined activity and selectivity for aniline conversion to nonorganic compounds. After 2 h of reaction, 96% aniline conversion and 76% of selectivity were attained. Under the employed reaction conditions, leaching of copper was detected in small extent. However, heterogeneous catalytic activity was proved and attributed to copper oxide anchored to MCM-41.