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Citation: HOU Bin, HAN Xin-you, LIN Ming-gui, FANG Ke-gong. Preparation of SiO2-coated CuFe catalysts for synthesis of higher alcohols from CO hydrogenation[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(02): 217-224. shu

Preparation of SiO2-coated CuFe catalysts for synthesis of higher alcohols from CO hydrogenation

  • 1.

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

  • 2.

    2. University of Chinese Academy of Sciences, Beijing 100049, China

  • Corresponding author: FANG Ke-gong, 
  • Received Date: 30 September 2015
    Available Online: 19 November 2015

    Fund Project: 国家自然科学基金(21473230) (21473230)国家高技术研究发展计划(863计划,2012AA051002) (863计划,2012AA051002)中国科学院战略先导项目(XDA01020304)资助. (XDA01020304)

  • A series of SiO2-coated CuFe(SiO2@CuFe) catalysts with different Cu/Fe molar ratios were prepared by co-reduction and in situ coating method.The physicochemical properties of the catalysts were characterized with XRD,TEM,SEM-EDS,XPS and H2-TPR techniques and N2 sorption experiment.It was shown that well-dispersed CuFe nanoparticles were completely coated by mesoporous silica in the as-prepared catalysts.The content of Cu-Fe composite oxide in the catalyst and the selectivity of total alcohols and C+2 alcohols both exhibit a volcano trend with the decrease of Cu/Fe molar ratios.When the Cu/Fe molar ratio was 1,the largest amount of CuFe2O4 was formed,consequently,causing the strongest interaction between Cu and Fe.In addition,the obtained catalyst possessed higher BET surface area and larger BJH pore volume than the other samples.Thus,alcohol products easily diffuse into/out of its pores,thus avoiding the further hydrogenation to hydrocarbons.As a result,it shows the highest selectivity to total alcohols and C+2 alcohols.
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