Abstract
A deep eutectic solvent (DES) consisting of choline chloride and glycerol (1:2 molar ratio) was prepared and used as the solvent in CaO-catalyzed transesterification of rapeseed oil to produce biodiesel. In addition to its solvent role, DES activated commercial CaO to be a catalyst for the transesterification reaction. The yield of fatty acid methyl ester (FAME) with the addition of DES reached 91.9%, while the FAME yield with no DES was only 4.0%. The commercial CaO samples before and after reaction were characterized by Powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Scanning Electronic Microscopy (SEM). These measurements indicate that the surface of commercial CaO is typically covered by a layer of CaCO 3 and Ca(OH)2 which inhibits the activity of CaO, while the addition of DES can eliminate this inhibiting layer leading to CaO activation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 11943-11947 |
| Number of pages | 5 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 52 |
| Issue number | 34 |
| DOIs | |
| State | Published - Aug 28 2013 |
| Externally published | Yes |
