Material Presets
Arrhenius Parameters
Activation Energy Ea
150 kJ/mol
Wood: 100–200 / Polymers: 150–250 / Coal: 50–150
log₁₀(A) [s⁻¹]
11.0
Reaction Order n
1.0
Temperature Range
Start Temperature T0
300 °C
End Temperature Tend
800 °C
Heating Rate β
10 K/min
Product Distribution
Char Yield (low T)
30 %
Tar/Oil Yield (mid T)
50 %
Kinetics Summary
—
k(500°C) [s⁻¹]
—
Peak Decomp. Temp. (°C)
—
Half-life at 500°C (s)
Key Equations
Arrhenius: $k(T) = A \exp\!\left(-\dfrac{E_a}{RT}\right)$
Isothermal conversion: $\alpha(t) = 1 - \exp(-kt)$
Non-isothermal: $\dfrac{d\alpha}{dT} = \dfrac{A}{\beta}\exp\!\left(-\dfrac{E_a}{RT}\right)(1-\alpha)^n$
Kissinger method: $E_a = -R \cdot \dfrac{d\ln(\beta/T_p^2)}{d(1/T_p)}$
Model Scope: This tool uses a single-step nth-order reaction model. Real pyrolysis — especially biomass — involves parallel and sequential reactions of multiple components (hemicellulose, cellulose, lignin). For precise analysis, use isoconversional methods (FWO, KAS) or multi-component kinetic models.