Research Article
Extruded Catalysts with Magnetic Properties for Biodiesel Production
Figure 6
X-ray diffraction patterns for (a) Fe3O4, (b) γ-Al2O3, (c) sepiolite, (d) K2CO3/γ-Al2O3/(0.3)Fe3O4 catalyst, and (e) K2CO3/γ-Al2O3/sepiolite/(0.3)Fe3O4 catalyst.