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Composition of the acid mixtures (v/v basis) used in the chemical activation and corresponding loss of mass in the ash after each activation step.
| Sample ID | Percentage of acids (%) | Percentage of burn-off (%) | ||
|---|---|---|---|---|
| H2SO4 | H3PO4 | Chemical activation | Physical activation with CO2 | |
| AC1 | 0 | 100 | 7.3 | 12.2 |
| AC2 | 20 | 80 | 3.8 | 9.4 |
| AC3 | 40 | 60 | 0.1 | 0.8 |
| AC4 | 60 | 40 | 11.6 | 7.7 |
| AC5 | 80 | 20 | 15.5 | 8.9 |
| AC6 | 100 | 0 | 20.5 | 3.0 |
