| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 49523 | Catalysis Communications | 2015 | 4 Pages |
•Fluorine modified Mg3Al1 and Mg3Al0.6La0.4 oxides were synthesized.•The basicity of catalysts was improved due to alkaline fluoride compounds.•The unsaturated F- anions became strong basic sites after modification.•The maximum FAME yield from waste cooking oil was 98.9% at 338 K in 8 h.
KF supported Mg3Al and Mg3Al0.6La0.4 oxides were respectively synthesized by wet impregnation. The catalyst samples were characterized by BET, ICP-AES, XRD, XPS and CO2-TPD. The results exhibited that the decomposition of KF modified hydrotalcites resulted in fluoride impregnated oxides. The basicity of KF supported oxides was improved due to the alkaline fluoride compounds. The catalysts were tested in the transesterification of waste cooking oil and methanol. A FAME yield (98.9%) was observed with a methanol to oil molar ratio of 12:1 and 3 wt.% catalyst amount in 8 h at 338 K.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
