MCM-41 supported Mo/Zr mixed oxides as catalysts in liquid phase condensation of 2-methylfuran with acetone
✍ Scribed by Tao Li; Soofin Cheng; Jyh-Fu Lee; Ling-Yun Jang
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 174 KB
- Volume
- 198
- Category
- Article
- ISSN
- 1381-1169
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✦ Synopsis
Molybdenum and zirconium mixed oxides were supported on siliceous MCM-41 mesoporous material. The resultant materials were characterized with various techniques such as X-ray diffraction (XRD), nitrogen adsorption, Transmission electron microscopy (TEM), XANES, NH 3 -TPD, and Diffuse reflectance infrared Fourier transform spectra (DRIFTS) of pyridine. It was found that the well-ordered channeling pores of MCM-41 were retained with a maximum loading of 9 wt.% MoO 3 and 13 wt.% ZrO 2 . The ZrMo 2 O 8 crystallites appeared with an even higher loading. The materials had surface areas greater than 500 m 2 /g and a relatively narrow pore size distribution. MoO 3 and ZrO 2 were well dispersed inside the pores of MCM-41. The Mo(VI) was found in octahedral coordination when no ZrMo 2 O 8 crystallites were detected. The MoO 3 /ZrO 2 /MCM-41 samples contained only Lewis acid sites. Although NH 3 -TPD experiments indicated that its acid strength was weaker than that of Y-zeolite, the MoO 3 /ZrO 2 /MCM-41 materials were excellent catalysts for liquid phase condensation of 2-methylfuran (MF) with acetone to form 2,2-bis(5-methylfuryl)propane (BMP).