Catalytic Kinetics: selective_catalytic_reduction
Catalytic reaction kinetics data — activation energy, pre-exponential factors, rate expressions, selectivity, conversion, and deactivation rates for industrial catalytic processes
| reaction id | catalyst id | activation energy kJ mol (kJ/mol) | catalyst name | conversion pct typical (%) | deactivation rate hr (1/hr) | notes | pre exponential factor | pre exponential units | pressure range bar | rate expression | rate law type | reaction order forward | reaction stoichiometry | selectivity pct (%) | space velocity hr | temperature range C |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| selective_catalytic_reduction | cu_zeolite_ssz13 | 58 | Cu-SSZ-13 zeolite SCR (mobile) | 90 | 0.000008 | Mobile emissions (diesel SCR) catalyst; lower apparent Ea vs V2O5; dual-site Cu2+ active centers; max NOx conv ~300°C then decline | 210,000 | mol/m3_cat/s | 1-5 | r = A*exp(-Ea/RT)*C_NO*C_NH3 / (1+K_NH3*C_NH3)^2 | langmuir_hinshelwood | 1 | 4NO + 4NH3 + O2 → 4N2 + 6H2O | 98 | 30000-150000 | 200-550 |
| selective_catalytic_reduction | fe_zeolite_beta | 63 | Fe-beta zeolite SCR | 80 | 0.00001 | Fe-zeolite better for high-T and NO2-rich feeds; broader T window vs Cu-zeolite; Ea ~55-75 kJ/mol | 450,000 | mol/m3_cat/s | 1-5 | r = A*exp(-Ea/RT)*C_NO^0.5*C_NH3^0.5*(1 - C_N2*C_H2O^1.5/(Keq*C_NO*C_NH3^1.5)) | langmuir_hinshelwood | 0.5 | 4NO + 4NH3 + O2 → 4N2 + 6H2O | 92 | 30000-100000 | 300-600 |
| selective_catalytic_reduction | v2o5_tio2 | 67 | V2O5/WO3-TiO2 conventional SCR | 85 | 0.00003 | Standard vanadium SCR catalyst; Eley-Rideal mechanism (adsorbed NH3 reacts with gas-phase NO); Ea~60-80 kJ/mol | 830,000 | mol/m3_cat/s | 1-5 | r = A*exp(-Ea/RT)*C_NO*theta_NH3 | eley_rideal | 1 | 4NO + 4NH3 + O2 → 4N2 + 6H2O | 95 | 5000-30000 | 300-420 |
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