A continuous process for biodiesel production in supercritical carbon dioxide was implemented. In the transesterification of virgin sunflower oil with methanol, Lipozyme TL IM led to fatty acid methyl esters yields (FAME) that exceeded 98% at 20 MPa and 40 °C, for a residence time of 20 s and an oil to methanol molar ratio of 1:24. Even for moderate reaction conversions, a fractionation stage based on two separators afforded FAME with >96% purity. Lipozyme TL IM was less efficient with waste cooking sunflower oil. In this case, a combination of Lipozyme TL IM and Novozym 435 afforded FAME yields nearing 99%.
|Number of pages||6|
|Journal||Journal of Supercritical Fluids|
|Publication status||Published - 1 Jan 2011|
|Event||2nd Iberoamerican Conference on Supercritical Fluids (PROSCIBA) - Natal, Brazil|
Duration: 5 Apr 2010 → 9 Apr 2010
- Downstream processing
- Waste cooking oil