On the role of the activation procedure of supported hydrotalcites for base catalyzed reactions: Glycerol to glycerol carbonate and self-condensation of acetone

M.G. Alvarez, A.M. Frey, J.H. Bitter, A.M. Segarra, K.P. de Jong, F. Medina

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

Bulk and carbon nanofiber supported MgAl hydrotalcites have been investigated as solid base catalysts for the synthesis of glycerol carbonate and dicarbonate and for the self-condensation of acetone. The supported materials exhibited a 300 times higher activity compared to bulk activated hydrotalcites for the transesterification. The materials could be reused while maintaining a high yield of glycerol carbonate. The activity of the mixed oxide, i.e., hydrotalcite materials after high temperature activation was considerably higher than both gas-phase and liquid phase rehydrated samples for the glycerol reactions. In contrast in the acetone self-condensation reaction the rehydrated samples were more active. This indicates that the polarity of the catalyst related to the reactant properties has a huge impact on the performance of a solid base catalyst.
Original languageEnglish
Pages (from-to)231-237
JournalApplied Catalysis B-Environmental
Volume134-135
DOIs
Publication statusPublished - 2013

Keywords

  • claisen-schmidt condensation
  • mg-al hydrotalcite
  • solid base
  • aldol condensation
  • nanofibers
  • hydroxides
  • chemicals

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