Research Article
Optimization Study in Biodiesel Production via Response Surface Methodology Using Dolomite as a Heterogeneous Catalyst
Table 2
Structural properties of the dolomite catalyst determined by XRD.
| Samples | Structural | Phase detected | Crystalline phasea | Crystallite diameter (nm)b |
| Dolomite | CaMg | 92.05 | 96.0 | Ca(CO3) | 6.72 | 22.0 | SiO2 | 1.22 | 99.4 |
| D-700°C | MgO | 31.52 | 17.5 | Ca(OH)2 | 38.75 | 12.9 | Ca(CO3) | 27.56 | 28.9 | SiO2 | 2.17 | 125.4 |
| D-800°C | CaO | 23.57 | 23.8 | MgO | 33.57 | 17.7 | Ca(OH)2 | 40.41 | 12.6 | SiO2 | 2.45 | 129.1 |
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After Rietveld refinement (wt%) [26], bScherrer equation.
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