Table 3. Comparison of the 30Ca/A-SBC-700 Catalyst with Other Reported Solid Base (SiO2) Derived Catalysts.
| transesterification parameters |
|||||||
|---|---|---|---|---|---|---|---|
| catalyst | support | temperature (°C) | molar ratio | time (min) | catalyst loading (wt %) | biodiesel yield (%) | reference |
| Ca/SBA-15 | SBA-15 | 200 | 6:1 | 480 | 5 | 99.1 | (44) |
| CaO/SiO2 | chicken eggshells | 65 | 9:1 | 180 | 5 | 90.2 | (20) |
| CaO/SiO2 | rice husk ash | 65 | 9:1 | 240 | 7 | 91.5 | (45) |
| CaO/SiO2 | natural diatomite | 65 | 9:1 | 150 | 6 | 92.4 | (21) |
| CaO/SiO2 | peat biochar | 65 | 8:1 | 150 | 5 | 93.4 | (37) |
| CaO/SiO2 | municipal sludge biochar | 65 | 8:1 | 150 | 5 | 93.8 | present work |