Table 3. Inventory Data for Biodiesel (BD) Production via Transesterification and Renewable Diesel (RD) Production via Hydro-Processing (per kg BD or RD).
| biodiesel |
renewable diesel | ||
|---|---|---|---|
| vegetable oil | high ffa oil | all pathways | |
| feedstock input (kg/kg BD or RD) | 1.00 | 1.05 | 1.26 |
| energy use (MJ/kg BD or RD) | |||
| natural gas | 1.07 | 2.78 | 0.82 |
| electricity | 0.13 | 0.36 | 0.43 |
| material inputs | |||
| hydrogen (MJ/kg) | - | - | 4.81 |
| methanol (g/kg) | 109 | 109 | - |
| sodium hydroxide (g/kg) | 1.07 | - | - |
| sodium methoxide (g/kg) | 3.62 | - | - |
| hydrochloric acid (g/kg) | 1.68 | 2.61 | - |
| phosphoric acid (g/kg) | 0.44 | 2.17 | - |
| sulfuric acid (g/kg) | 1.10 | - | - |
| citric acid (g/kg) | 0.003 | - | - |
| sodium methylate (g/kg) | 0.35 | - | - |
| water consumption (L/kg) | 0.15 | 0.99 | - |
| outputs | |||
| fuel (BD or RD, kg) | 1.00 | 1.00 | 1.00 |
| coproducts (fuel gas, LPG, and naphtha) (MJ/kg RD) | - | - | 1.93 |
| glycerin (100% pure, kg/kg BD) | 0.10 | 0.07 | - |
| FFA and distillation bottoms coproducts (kg/kg BD) | 0.01 | 0.07 | - |