Research Article
A Kinetic Study of Marginal Soil Energy Plant Helianthus annuus Stalk Pyrolysis
Table 5
The activation energies of H. annuus stalk obtained by FWO method and KAS method at different conversion rates.
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Conversion rate/α | FWO method | KAS method | Popescu method | /kJ Mol−1 | | ln /min−1 | /kJ Mol−1 | | ln /min−1 | Conversion Rate/α | /kJ Mol−1 | | ln /min−1 |
| 0.1 | 209.9 | 0.9997 | 20.70 | 214.7 | 0.9997 | 19.56 | 0.1–0.2 | 88.4 | 0.9091 | 12.83 | 0.2 | 178.5 | 0.9976 | 17.54 | 183.2 | 0.9977 | 16.72 | 0.2–0.3 | 115.5 | 0.9406 | 20.11 | 0.3 | 148.0 | 0.9849 | 15.48 | 152.4 | 0.9855 | 13.03 | 0.3–0.4 | 131.1 | 0.9463 | 24.28 | 0.4 | 128.9 | 0.9575 | 13.10 | 133.2 | 0.9590 | 11.73 | 0.4–0.5 | 138.1 | 0.9457 | 26.43 | 0.5 | 121.3 | 0.9190 | 12.02 | 125.5 | 0.9218 | 12.57 | 0.5–0.6 | 128.2 | 0.8957 | 25.14 | 0.6 | 128.2 | 0.8968 | 12.56 | 132.5 | 0.9006 | 11.39 | 0.6–0.7 | 119.4 | 0.8878 | 24.27 | 0.7 | 139.8 | 0.9067 | 13.55 | 144.2 | 0.9105 | 12.22 | 0.7–0.8 | 136.4 | 0.8271 | 28.66 | 0.8 | 142.0 | 0.9160 | 14.41 | 146.3 | 0.9195 | 9.04 | 0.8–0.9 | 195.0 | 0.9644 | 41.34 | 0.9 | 120.6 | 0.9043 | 10.81 | 124.6 | 0.9077 | 10.77 | | | | |
| Average | 146.4 29.71 | | 150.7 29.94 | | | 131.5 30.17 | | Average | 142.9 10.08 | | | | | | |
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E: Activation energy; A: pre-exponential factor; R: correlation coefficient.
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