Journal of Energy / 2013 / Article / Tab 5

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.

Conversion
rate/α
FWO methodKAS methodPopescu method
/kJ
Mol−1
ln  /min−1 /kJ
Mol−1
ln  /min−1Conversion
Rate/α
/kJ
Mol−1
ln  /min−1

0.1209.90.999720.70214.70.999719.560.1–0.288.40.909112.83
0.2178.50.997617.54183.20.997716.720.2–0.3115.50.940620.11
0.3148.00.984915.48152.40.985513.030.3–0.4131.10.946324.28
0.4128.90.957513.10133.20.959011.730.4–0.5138.10.945726.43
0.5121.30.919012.02125.50.921812.570.5–0.6128.20.895725.14
0.6128.20.896812.56132.50.900611.390.6–0.7119.40.887824.27
0.7139.80.906713.55144.20.910512.220.7–0.8136.40.827128.66
0.8142.00.916014.41146.30.91959.040.8–0.9195.00.964441.34
0.9120.60.904310.81124.60.907710.77

Average146.4 29.71150.7 29.94131.5 30.17
Average142.9 10.08

E: Activation energy; A: pre-exponential factor; R: correlation coefficient.