Table2 Fuel data for Danish cereal straw and wood chips [20]
Chemical composition. Unit: wt% on dry basis | Straw | Wood chips | ||
|---|---|---|---|---|
Typical | Variation | Typical | Variation | |
Ash | 4.5 | 2–7 | 1.0 | 0.3–6 |
Volatiles | 78 | 75–81 | 81 | 70–85 |
Hydrogen, H | 5.9 | 5.4–6.4 | 5.8 | 5.2–6.1 |
Carbon, C | 47.5 | 47–48 | 50 | 49–52 |
Nitrogen, N | 0.7 | 0.3–1.5 | 0.3 | 0.1–0.7 |
Sulphur, S | 0.15 | 0.1–0.2 | 0.05 |  < 0.1 |
Chlorine, Cl | 0.4 | 0.1–1.1 | 0.02 |  < 0.1 |
Silicon, Si | 0.8 | 0.1–1.5 | 0.1 |  < 1.1 |
Aluminum, Al | 0.005 |  < 0.03 | 0.015 |  < 0.1 |
Iron, Fe | 0.01 |  < 0.03 | 0.015 |  < 0.1 |
Calcium, Ca | 0.4 | 0.2–0.5 | 0.2 | 0.1–0.9 |
Magnesium, Mg | 0.07 | 0.04–0.13 | 0.04 |  < 0.1 |
Sodium, Na | 0.05 |  < 0.3 | 0.015 |  < 0.1 |
Potassium, K | 1.0 | 0.2–1.9 | 0.1 | 0.05–0 |
Phosphorus, P | 0.08 | 0.03–0.2 | 0.02 |  < 0.1 |