| Parameters (wt%) | Wheat straw | Solar carbon |
| Carbon | 46 ± 1 | 70 ± 1 |
| Hydrogen | 6.0 ± 0.1 | 3.5 ± 0.1 |
| Nitrogen | 0.3 ± 0.1 | 0.8 ± 0.1 |
| Oxygen | 41 ± 1 | 15 ± 1 |
| Sulfur | 0.3 ± 0.1 | 0.4 ± 0.1 |
| Ash | 7.0 ± 0.1 | 10.5 ± 0.1 |
| O/C (molar ratio) | 0.7 | 0.2 |
| H/C (molar ratio) | 1.6 | 0.6 |