Fig. 3From: A sustainable process for biodiesel production using Zn/Mg oxidic species as active, selective and reusable heterogeneous catalystsXRD patterns for the prepared catalysts. (a) MgO/γ-Al2O3; (b) 0.5 Zn/Mg; (c) 1 Zn/Mg; (d) 1.5 Zn/Mg; (e) 2 Zn/Mg and (f) ZnO/γ-Al2O3Back to article page