Novel application of thermally expanded graphite as the support of catalysts for direct synthesis of DMC from CH3OH and CO2

J Colloid Interface Sci. 2009 Jun 1;334(1):50-7. doi: 10.1016/j.jcis.2009.03.009. Epub 2009 Mar 28.


Novel Cu-Ni bimetallic catalysts supported on thermally expanded graphite (TEG) were prepared as an example to show the particular characteristics of TEG as a carbon support material. The structures of TEG and the synthesized Cu-Ni/TEG catalysts were characterized using BET, FTIR, TG, SEM, TEM, XRD and TPR techniques. The catalytic activities of the prepared catalysts were investigated by performing micro-reaction in the direct synthesis of dimethyl carbonate (DMC) from CH3OH and CO2. The experimental results indicated that the prepared Cu-Ni/TEG catalysts exhibited highly catalytic activity. Under the optimal catalytic conditions at 100 degrees C and under 1.2 MPa, the highest conversion of CH3OH of 4.97% and high selectivity of DMC of 89.3% can be achieved. The highly catalytic activity of Cu-Ni/TEG in DMC synthesis can be attributed to the synergetic effects of metal Cu, Ni and Cu-Ni alloy in the activation of CH3OH and CO2 and the particular characteristics of TEG as a carbon support material.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon Dioxide / chemical synthesis
  • Carbon Dioxide / chemistry*
  • Catalysis
  • Copper / chemistry*
  • Formates / chemical synthesis*
  • Formates / chemistry
  • Graphite / chemistry*
  • Methanol / chemical synthesis
  • Methanol / chemistry*
  • Nickel / chemistry*
  • Temperature


  • Formates
  • Carbon Dioxide
  • Graphite
  • Copper
  • Nickel
  • methyl carbonate
  • Methanol