Table 4.
Energy analysis for NaOH-CH4. The solids loadings of 50 and 200 g/L were considered.
| Solid Loadings (gTS/L) | 50 | 200 |
|---|---|---|
| Thermal energy gain (kWh/t TS)a | 317 | 317 |
| Heat energy (HE) requirement (kWh/t TS) | 1343 | 385 |
| HE requirement with 80% of heat recovery (kWh/t TS) | 268.6 | 77 |
| Net heat energy (NHE) (kWh/t TS)b | −1026 | −68 |
| NHE with 80% of heat recovery (kWh/t TS) | 48.4 | 240 |
a Thermal energy gain corresponds to the difference of heat energies produced by NaOH-CH4 minus CH4 of GL; b NHE is the difference between the thermal energy increase and the heat energy requirement for the alkaline pretreatment.