The Synthesis of Dimethyl Carbonate by the Oxicarbonylation of Methanol Over Cu Supported on Carbon Norit

G. Merza, B. László, A. Oszkó, G. Pótári, E. Varga, A. Erdohelyi

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Abstract

The catalytic activity of Norit supported Cu, Ni and Cu-Ni catalysts was investigated in the synthesis of dimethyl carbonate (DMC) by the oxidative carbonylation of methanol. Cu/Norit showed the best catalytic activity. The reaction was carried out in a continuous flow system at atmospheric pressure usually at 393 K. The main products were methyl formate, DMC and CO2. The methanol conversion on Cu/Norit achieved in steady state was about 22 % and the DMC yield 13.2 %. Based on the XPS data we can establish that copper reduced to its metallic form during reduction but oxidized in the reaction mixture, and is mostly in the Cu+ state, with some Cu2+. It is possible that the DMC formation rate depends on the surface concentration of oxidized Cu and on the ratio of Cu+ and Cu2+. Based upon the IR measurements adsorbed DMC was found on the surface of the Cu/Norit catalyst during the catalytic reaction.

Original languageEnglish
Pages (from-to)881-892
Number of pages12
JournalCatalysis Letters
Volume145
Issue number3
DOIs
Publication statusPublished - Mar 4 2015

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Keywords

  • Active carbon
  • Cu/Norit
  • Dimethyl carbonate
  • Oxidative carbonylation
  • Supported Cu catalyst

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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