Commercially, fatty acid alkyl esters (FAAEs) are manufactured either by direct esterification of fatty acids or by alcoholysis (also called transesterification) of triglycerides (TGs). Esterification is carried out batchwise at 473–573 K under pressure; water of reaction has to be removed continuously in order to obtain high yields. Esterification can also be carried out continuously in a countercurrent reaction column using a superheated alcohol [1]. However, the predominant process for the manufacture of FAAEs is transesterification of TGs with alcohol at reflux temperature and atmospheric pressure in the presence of a catalyst.