Cs promoted triglyceride transesterification over MgO nanocatalysts

Janine M. Montero, Karen Wilson, Adam F. Lee

Research output: Contribution to journalArticlepeer-review


The influence of Cs on the structure and basicity of nanocrystalline MgO was assessed via electron microscopy, CO2 chemisorption, XRD and XPS. Caesium incorporation via co-precipitation under supercritical conditions generates Cs2Mg(CO3)2 nanocrystallites with an enhanced density and strength of surface base sites. Wet impregnation proved less effective for modifying MgO nanocrystals. A strong synergy between Cs and Mg components in the co-precipitated material dramatically enhanced the rate of tributyrin transesterification with methanol relative to undoped MgO and homogeneous Cs2CO3 catalysts. On-stream deactivation of Cs-doped MgO reflects heavy surface carbon deposition and loss of the high activity Cs2Mg(CO3)2 phase due to limited Cs dissolution.
Original languageEnglish
Pages (from-to)737-745
Number of pages9
JournalTopics in Catalysis
Issue number11-12
Early online date26 Mar 2010
Publication statusPublished - 1 Jul 2010


  • Alkali metal-doping
  • basicity
  • biodiesel
  • catalysis
  • nanocrystalline MgO
  • transesterification


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