Table 7.

SCR reaction and reaction rate used by Park et al. [141,143].

Description	Reaction	Reaction Rate
NH3 adsorption	NH3 + S → NH3-S	${\mathit{R}}_{\mathbf{1}}={\mathit{A}}_{\mathbf{1}}{\mathit{C}}_{\mathit{N}\mathit{H}}{}_{\mathbf{3}}\left(\mathbf{1}-\mathit{\theta }\right)$
NH3 desorption	NH3-S → NH3 + S	${\mathit{R}}_{\mathbf{2}}={\mathit{A}}_{\mathbf{2}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{2}}}{\mathit{R}\mathit{T}}\right)\mathit{\theta }$
NH3 oxidation	2 NH3-S +3/2 O2 → N2 + 3 H2O + 2 S	${\mathit{R}}_{\mathbf{3}}={\mathit{A}}_{\mathbf{3}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{3}}}{\mathit{R}\mathit{T}}\right){\mathit{C}}_{{\mathit{O}}_{\mathbf{2}}}\mathit{\theta }$
NH3 oxidation	NO + 1/2 O2 → NO2	${\mathit{R}}_{\mathbf{4}}={\mathit{A}}_{\mathbf{4}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{4}}}{\mathit{R}\mathit{T}}\right){\mathit{C}}_{\mathit{N}\mathit{O}}{\mathit{C}}_{{\mathit{O}}_{\mathbf{2}}}^{\mathbf{1}/\mathbf{2}}-{\mathit{k}}_{\mathbf{4},\mathit{b}}{\mathit{C}}_{\mathit{N}{\mathit{O}}_{\mathbf{2}}}$ where ${\mathit{k}}_{\mathbf{4},\mathit{b}}={\mathit{A}}_{\mathbf{4}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{\raisebox{1ex}{${\mathit{E}}_{\mathit{a},\mathbf{4}}$}\!\left/ \!\raisebox{-1ex}{$\mathit{R}\mathit{T}$}\right.}{{\mathit{K}}_{\mathit{e}\mathit{q}}}\right){\mathit{C}}_{\mathit{N}\mathit{O}}\mathit{\theta }$ ${\mathit{K}}_{\mathit{e}\mathit{q}}=\mathit{e}\mathit{x}\mathit{p}\left(-\frac{\Delta \mathit{S}}{\mathit{R}}\right)\mathit{e}\mathit{x}\mathit{p}\left(-\frac{\Delta \mathit{H}}{\mathit{R}\mathit{T}}\right)$
Standard NH3 SCR	4 NH3-S + 4 NO + O2 → 4 N2 + 6 H2O + 4 S	${\mathit{R}}_{\mathbf{5}}={\mathit{A}}_{\mathbf{5}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{5}}}{\mathit{R}\mathit{T}}\right){\mathit{C}}_{\mathit{N}\mathit{O}}\mathit{\theta }$
Rapid NH3 SCR	2 NH3-S + NO + NO2 → 2 N2 + 3 H2O + 2 S	${\mathit{R}}_{\mathbf{6}}={\mathit{A}}_{\mathbf{6}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{6}}}{\mathit{R}\mathit{T}}\right){\mathit{C}}_{\mathit{N}\mathit{O}}{\mathit{C}}_{\mathit{N}{\mathit{O}}_{\mathbf{2}}}\mathit{\theta }$
NH3 SCR with NO2	4 NH3-S + 3 NO2 → 3.5 N2 + 6 H2O + 4 S	${\mathit{R}}_{\mathbf{7}}={\mathit{A}}_{\mathbf{7}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{7}}}{\mathit{R}\mathit{T}}\right){\mathit{C}}_{\mathit{N}{\mathit{O}}_{\mathbf{2}}}\mathit{\theta }$
N2O formation by SCR	2 NH3-S + 2 NO2 → N2O + N2 + 3 H2O + 2 S	${\mathit{R}}_{\mathbf{8}}={\mathit{A}}_{\mathbf{8}}\mathit{e}\mathit{x}\mathit{p}\left(\frac{{\mathit{E}}_{\mathit{a},\mathbf{8}}}{\mathit{R}\mathit{T}}\right){\mathit{C}}_{\mathit{N}{\mathit{O}}_{\mathbf{2}}}\mathit{\theta }$