Biodiesel synthesis using integrated acid and base catalysis in continuous flow

• Mousa Asadi^a
• Joel F. Hooper^a
• David W. Lupton^a

• ^aSchool of Chemistry, Monash University, Clayton 3800, Victoria, Australia

The use of biodiesel derived from oils and fats is making an increased contribution as a renewable energy sources. The synthesis of biodiesel involves transesterification of triglycerides to the monoalkyl esters, a process often made challenging by the presence of free fatty acids (FFA). Herein an integrated flow system for the synthesis of biodiesel, employing a solid supported acid catalyst for esterification of FFAs, followed by transesterification using polymer supported N-heterocycle carbene (NHC) catalyst is reported. This system delivers biodiesel in high yields from a variety of fat and oils, using robust and recyclable catalysts.

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