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

doi:10.11944/j.issn.1000-0518.2016.11.160022

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (11): 1295-1302.DOI: 10.11944/j.issn.1000-0518.2016.11.160022

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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

^aLiaoning Province Key Laboratory for Synthesis and Application of the Functional Compounds,Bohai University,Jinzhou,Liaoning 121013,China
^bSchool of Chemistry and Environmental Engineering,Liaoning University of Technology,Jinzhou,Liaoning 121001,China

Received:2016-01-14 Accepted:2016-04-19 Published:2016-11-01 Online:2016-11-01
Contact: QIAN Jianhua,LI Junhua
Supported by:
Supported by the Third Distinguished Professor of the Education Department of Liaoning Province(No.2014-323), Innovation Team Project in Liaoning Province Department of Education(No.LT2015T001)

Abstract

Abstract:

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 ℃.

Key words: cerium modified titanium dioxide, vanadium pentoxide, methanol oxidation, dimethoxymethane

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.

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

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