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Citation: LIU Guang-bo, ZHANG Qing-de, HAN Yi-zhuo, TSUBAKI Noritatsu, TAN Yi-sheng. Low-temperature oxidation of dimethyl ether to methyl formate with high selectivity over MoO3-SnO2 catalysts[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(2): 223-227. shu

Low-temperature oxidation of dimethyl ether to methyl formate with high selectivity over MoO3-SnO2 catalysts

  • 1.

    1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

  • Corresponding author: TAN Yi-sheng, 
  • Received Date: 14 October 2012
    Available Online: 24 December 2012

    Fund Project: 国家自然科学基金(20903114, 20773154) (20903114, 20773154) 山西省自然科学基金(2010011015-1) (2010011015-1) 科技部自主研究课题(2010BWZ001) (2010BWZ001) 中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC15)。 (2011SQNRC15)

  • Low-temperature oxidation of dimethyl ether (DME) to methyl formate (MF) with high selectivity was realized in a continuous flow fixed-bed reactor over the multifunctional MoO3-SnO2 catalysts designed and prepared intentionally. The effect of the preparation methods including mechanical mixing, co-precipitation and co-precipitation-impregnation on the catalyst activity was investigated. The results showed that the selectivity to MF reaches 94.1% at 160℃ over the catalyst prepared by co-precipitation-impregnation, with DME conversion of 33.9% and absence of COx in the products. The results of NH3-TPD, CO2-TPD and H2-TPR characterizations indicated that the catalysts prepared by various methods are also obviously different in the surface acidic, alkaline and redox properties. The results of Raman, XRD and TEM revealed that MoO3 structure and particle sizes have a significant influence on the catalyst activity; small particle size and oligomeric MoO3 may be responsible for the high activity of the MoO3-SnO2 catalysts from co-precipitation-impregnation in the selective oxidation of DME to MF at low temperature.
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