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

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...

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Bibliographic Details
Published in:Journal of colloid and interface science 2009-06, Vol.334 (1), p.50-57
Main Authors: Bian, J, Xiao, M, Wang, S J, Lu, Y X, Meng, Y Z
Format: Article
Language:English
Subjects:
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
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Summary: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.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2009.03.009