Biodiesel synthesis using calcined layered double hydroxide catalysts

J. Link Shumaker, Czarena Crofcheck, S. Adam Tackett, Eduardo Santillan-Jimenez, Tonya Morgan, Yaying Ji, Mark Crocker, Todd J. Toops

Research output: Contribution to journalArticlepeer-review

145 Scopus citations


The catalytic properties of calcined Li-Al, Mg-Al and Mg-Fe layered double hydroxides (LDHs) were examined in two transesterification reactions, namely, the reaction of glyceryl tributyrate with methanol and the reaction of soybean oil with methanol. While the Li-Al catalysts showed high activity in these reactions at the reflux temperature of methanol, the Mg-Fe and Mg-Al catalysts exhibited much lower methyl ester yields. CO2 TPD measurements revealed the presence of sites of weak, medium and strong basicity on both Mg-Al and Li-Al catalysts, the latter showing higher concentrations of medium and strong base sites; by implication, these are the main sites active in transesterification catalyzed by calcined Li-Al LDHs. Maximum activity was observed for the Li-Al catalysts when a calcination temperature of 450-500 °C was applied, corresponding to decomposition of the layered double hydroxide to the mixed oxide without formation of crystalline lithium aluminate phases.

Original languageEnglish
Pages (from-to)120-130
Number of pages11
JournalApplied Catalysis B: Environmental
Issue number1-2
StatePublished - Jul 16 2008


  • Aluminum
  • Layered double hydroxide
  • Lithium
  • Transesterification
  • Triglyceride

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science (all)
  • Process Chemistry and Technology


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