Citation: QIAN Jianhua, DONG Qinghua, LI Junhua, LIU Lin, XING Jinjuan. Oxidation of Methanol to Dimethoxymethane over Vanadium Pentoxide/Cerium-Titanium Dioxide with High Selectivity[J]. Chinese Journal of Applied Chemistry, ;2016, 33(11): 1295-1302. doi: 10.11944/j.issn.1000-0518.2016.11.160022 shu

Oxidation of Methanol to Dimethoxymethane over Vanadium Pentoxide/Cerium-Titanium Dioxide with High Selectivity

QIAN Jianhua ^a,, ,
DONG Qinghua ^a ,
LI Junhua ^b,, ,
LIU Lin ^a ,
XING Jinjuan ^a

1.
a Liaoning Province Key Laboratory for Synthesis and Application of the Functional Compounds, Bohai University, Jinzhou, Liaoning 121013, China;
2.
b School of Chemistry and Environmental Engineering, Liaoning University of Technology, Jinzhou, Liaoning 121001, China

Corresponding author: QIAN Jianhua, LI Junhua,
Received Date: 14 January 2016
Available Online: 19 April 2016
Fund Project:

The composite Ce-TiO₂ support was prepared through solvothermal treament of Ce(NO₃)₃ and butyl titanate. A series of V₂O₅/Ce-TiO₂ catalysts with different vanadium loadings were obtained by incipient impregnation with ammonium metavanadate solution. The catalytic properties of V₂O₅/Ce-TiO₂ for selective oxidation of methanol to dimethoxymethane(DMM) were investigated. The V₂O₅/Ce-TiO₂ catalysts were characterized by XRD, UV-Vis, H₂-TPR, and NH₃-TPD. The results show that the dispersion of vanadium species is improved on the surface of Ce modified TiO₂. The interaction between vanadium species and supports is changed. The reduction temperature increases with the increasing Ce content. The Ce content in modified TiO₂ does not affect the acidity of the V₂O₅ supported catalysts, but the acidity of the catalysts decreases with the increasing of V₂O₅ content. For the catalyst of 10V/1Ce-TiO₂(The numbers 10 and 1 represent the mass percentage of V₂O₅ in the catalyst and molar ratio of Ce and TiO₂, respectively), the methanol conversion and DMM selectivity reach 39.6% and 99.9%, respectively, at 160℃.
- cerium modified titanium dioxide,
- vanadium pentoxide,
- methanol oxidation,
- dimethoxymethane
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