Catalysis Letters

, Volume 136, Issue 1, pp 35–44

Synthesis of Propylene Carbonate from Carbon Dioxide and Propylene Oxide Using Zn-Mg-Al Composite Oxide as High-efficiency Catalyst

Authors

  • Wei-Li Dai
    • College of Chemistry and Chemical EngineeringHunan University
    • Department of ChemistryHong Kong Baptist University
    • College of Chemistry and Chemical EngineeringHunan University
  • Rui Guo
    • College of Chemistry and Chemical EngineeringHunan University
  • Sheng-Lian Luo
    • College of Chemistry and Chemical EngineeringHunan University
  • Xin Du
    • College of Chemistry and Chemical EngineeringHunan University
    • College of Chemistry and Chemical EngineeringHunan University
    • Department of ChemistryHong Kong Baptist University
Article

DOI: 10.1007/s10562-009-0198-2

Cite this article as:
Dai, W., Yin, S., Guo, R. et al. Catal Lett (2010) 136: 35. doi:10.1007/s10562-009-0198-2

Abstract

A series of Zn-Al composite oxides that were modified with alkaline earth metals, Zn-M-Al-O (M = Mg, Ca, Sr, and Ba) were fabricated via calcination of the corresponding hydrotalcite precursors, and evaluated as catalysts for the synthesis of propylene carbonate (PC) from CO2 and propylene oxide. Among the Zn-M-Al-O catalysts, Zn-Mg-Al-O (Zn/Mg = 4.0, pH = 10, without hydrothermal treatment) is the best in performance, showing PC selectivity of 99.2% and yield of 88.8% (140 °C, 12 h). Furthermore, the Zn-Mg-Al-O catalyst can be readily reused and recycled without any loss of activity in a test of five cycles. Through detailed studies of the basic nature of the Zn-M-Al-O catalysts, it was found that a moderate basicity (6.1 ≤ H 0 < 8.9) is beneficial to the cycloaddition reaction. The NH3- and CO2-TPD results also indicate that the Zn-Mg-Al-O catalyst has acid–base bifunctional properties, and a reaction mechanism is proposed.

Graphic Abstract

Zn-Mg-Al composite oxides were prepared via calcination of the corresponding hydrotalcite precursors, and used as catalysts for the synthesis of propylene carbonate from CO2 and propylene oxide. We achieved high catalytic efficiency under mild conditions, easy separation of catalyst from the product, and good recyclability of the catalyst. A plausible reaction mechanism has been proposed for the catalytic action.
https://static-content.springer.com/image/art%3A10.1007%2Fs10562-009-0198-2/MediaObjects/10562_2009_198_Figa_HTML.gif

Keywords

Zn-Mg-Al-O composite oxide Propylene carbonate Propylene oxide Carbon dioxide Heterogeneous catalysis

Copyright information

© Springer Science+Business Media, LLC 2009