Table 6.
Energy requirements of H2 SCP production per step in kWh over dry mass of product. *Coal gasification energy cost refers to the energy equivalent of coal consumed for H2 production.
| Step | Energy cost (kWh/kg SCP) |
|---|---|
| Electrolysis | 23.9 |
| Fermentation | 1.6 |
| CO2 Direct air capture | 5.8 |
| Centrifugation | 0.8 |
| Spray drying | 5.8 |
| Total energy requirements for H2 SCP production via electrolysis and DAC | 37.8 |
| Air separation | 0.8 |
| Coal gasification* | 19.2 |
| Total energy requirements for H2 SCP production via gasification | 28.2 |