Reaction (Reference)

Mechanism

Reaction rate

Wood pyrolysis

(Blasi [12] )

$\text{Wood}\stackrel{}{\to }\text{Volatile}$

$\frac{\text{d}{M}_{vol}}{\text{d}t}=5.16\times {10}^6\exp \left(-10700/T_b\right)M_{wood}$

(64)

$\text{Wood}\stackrel{}{\to }\text{Char}\left(\text{C}\right)$

(65)

Char combustion

(Smith [26] )

$\text{Char}\left(\text{C}\right)+\frac{1}{2}{\text{O}}_{\text{2}}\to \text{CO}$

$\begin{array}{l}{\frac{\text{d}{M}_{char}}{\text{d}t})}_2=-60S{C}_{O_2}\frac{1}{1/k_r\zeta +1/k_m}\\ k_r=2.3T_p\exp \left(-11100/T_b\right)\end{array}$

(66)

Volatile combustion (Siminski et al. [7] )

${\text{C}}_x{\text{H}}_y+\left(\frac{1}{2}x+\frac{1}{4}y\right){\text{O}}_{\text{2}}\to x\text{CO}+\frac{y}{2}{\text{H}}_{\text{2}}\text{O}$

$\frac{\text{d}{C}_{vol}}{\text{d}t}=-59.8T_g{P}^{0.3}{C}_{vol}^{0.5}{C}_{{\text{O}}_{\text{2}}}\exp \left(-12200/T_g\right)$

(67)

Carbon monoxide combustion (Bartok and Sarofim [18] )

$\text{CO}+\frac{1}{2}{\text{O}}_2\to {\text{CO}}_{\text{2}}$

$\frac{\text{d}{C}_{\text{CO}}}{\text{d}t}=1.3\times {10}^{11}{C}_{\text{CO}}{C}_{{\text{H}}_{\text{2}}\text{O}}^{1/2}{C}_{{\text{O}}_{\text{2}}}^{1/2}\exp \left(-15105/T_g\right)$

(68)