Table 7.
Carbon footprint estimation of glycerol production process (GWP/kg CO2 eq)
| Glycerol (1 kg) | Processed palm kernel oil (1 kg) | Crude palm kernel oil (1 kg) | Palm kernel (1 kg) | ||||
|---|---|---|---|---|---|---|---|
| Total carbon emissions | 2.48 | Total carbon emissions | 2.14 | Total carbon emissions | 1.93 | Total carbon emissions | 1.4 |
| Processed palm kernel oil | 1.45 | Crude palm kernel oil | 1.96 | Palm kernel | 1.49 | Palm kernel processing | 1.21 |
| Crude palm kernel oil | 0.477 | Diesel combustion | 0.085 | Electricity | 0.235 | Crop harvest | 0.179 |
| Natural gas combustion | 0.311 | ocean shipping | 0.082 | Diesel combustion | 0.102 | Truck transportation | 0.012 |
| Bituminous coal combustion | 0.144 | ocean shipping | 0.086 | ||||
| ocean shipping | 0.0734 | ||||||
| Methanol | 0.0391 | ||||||