The effect of alkoxide ionic liquids on the synthesis of dimethyl carbonate from CO2 and methanol over ZrO2-MgO

Valerie Eta, Päivi Mäki-Arvela, Eero Salminen, Tapio Salmi, Dmitry Yu Murzin*, Jyri Pekka Mikkola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

39 Citations (Scopus)

Abstract

The use of carbon dioxide in the synthesis of chemicals, such as dimethyl carbonate (DMC), constitutes an environmentally attractive alternative to hazardous and toxic reagents. However, the direct synthesis of DMC from methanol and CO2 is characterized by low yields due to the reaction equilibrium and the thermodynamic limitations (ΔG298K 0 = +26.3 kj/mol). Alkoxide ionic liquids possessing alkylimidazolium and benzalkonium cations were prepared, characterised and tested together with ZrO2-MgO catalyst for the synthesis of DMC from methanol and CO 2. By using the novel ionic liquid as additives, ca. 12% conversion of methanol, and 90% selectivity to DMC was obtained at 120 °C and 7.5 MPa. The water abstracting potential of the ionic liquids influenced the conversion of methanol and the selectivity to DMC. The alkoxide ionic liquids were recovered and reused in DMC synthesis without loss in activity and selectivity.

Original languageEnglish
Pages (from-to)1254-1261
Number of pages8
JournalCatalysis Letters
Volume141
Issue number9
DOIs
Publication statusPublished - Sep 2011
MoE publication typeA1 Journal article-refereed

Keywords

  • Alkoxide ionic liquid
  • Carbon dioxide
  • Dimethyl carbonate
  • Methanol
  • ZrO -MgO

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