Liquid phase oxidation of aromatic hydrocarbons using highly ordered Nb and NbCo-MCM-41 nanoreactors
✍ Scribed by V Parvulescu; C Constantin; B.L Su
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 252 KB
- Volume
- 202
- Category
- Article
- ISSN
- 1381-1169
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✦ Synopsis
A series of Nb-and NbCo-containing mesoporous catalysts with variable Nb/Si molar ratios and a highly ordered hexagonal arrangement of the pores have been hydrothermally synthesized from sodium silicate or tetraethylortosilicate. The prepared materials were characterized by various techniques, such as: X-ray diffraction (XRD), N 2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). The oxidizing character of the Nb-or NbCo-MCM-41 materials was revealed in the selective oxidation of styrene, benzene and toluene with H 2 O 2 in liquid phase. A kinetic study was realized for oxidation of styrene with Nb-MCM-41 catalysts. All the Nb and NbCo modified mesoporous catalysts were very active in oxidation of styrene with H 2 O 2 .