The One-Step Oxidation of Methanol to Dimethoxymethane over Nanostructure Vanadium-Based Catalysts
The VO x -TiO2 (VT-RC) and sulfated VO x -TiO2 (VTS-RC) catalysts were prepared by rapid combustion method (RC) and evaluated by the one-step oxidation of methanol to dimethoxymethane (DMM). The results showed that the VT-RC and VTS-RC catalysts were consisted of nano-particles and exhibited pore structure. Compared with the coprecipitated VO x -TiO2 (VT-CP) catalyst, the VT-RC catalyst showed more acidic sites and stronger reducibility. The addition of sulfate into VT catalyst further increased the number of acidic sites and had little effect on the reducibility. The catalytic test showed that the VT-RC catalyst exhibited high DMM selectivity (89.96% at 35% methanol conversion), which was further increased on VTS-RC catalyst (91.76% at 48% methanol conversion), and that was due to the larger number of acidic sites and stronger reducibility on these catalysts.
KeywordsNanostructure vanadium-based catalysts Rapid combustion method Methanol selective oxidation Dimethoxymethane
This work was supported by the Key Project of Natural Science Foundation of China (No. 20603045) and the International Science & Technology Cooperation Project of Ministry of Science and Technology of China (No. 2007DFC60110).
- 7.Deltcheff CR, Aouissi A, Launayb S, Fournier M (1996) J Mole Catal A Chem 33:114Google Scholar
- 10.Sun Q, Fu YC, Liu JW, Auroux A, Shen JY (2007) Appl Catal A 334:26Google Scholar
- 12.Shen JY, Fu YC, Liu XJ (2004) CN 1634655AGoogle Scholar
- 27.Briand L, Gambaro L, Thomas H (1996) J Catal 16:1839Google Scholar
- 35.Li YC, Yan SR, Qian LP, Yang WM, Xie ZK, Chen QL, Yue B, He HY (2006) J Catal 24:1173Google Scholar