| 제목 |
디젤엔진의 NOx 저감을 위한 SCR DeNOx 촉매의 모델링 및 성능해석 |
| 분야 |
엔진 및 연소 |
| 언어 |
Korean |
| 저자 |
김영득(한양대학교), 김우승(한양대학교), 이천환(자동차부품연구원) |
| Key Words |
SCR(Selective Catalytic Reduction, 선택적 촉매환원), NH3(암모니아), NOx(질소산화물), Mathematical modeling(수학적 모델링), Numerical analysis(수치 해석) |
| 초록 |
The steady-state kinetics of the selective catalytic reduction (SCR) of NOx with NH3 has been investigated over a commercial V2O5/TiO2 catalyst. In order to account for the influence of transport effects the kinetics are coupled with a fully transient two-phase 1D+1D monolith channel model. The Langmuir-Hinshelwood (L-H) mechanism is adopted to describe the steady-state kinetic behavior of the V2O5/TiO2 catalyst. The reaction rate expressions are based on previously reported papers and are modified to fit the experimental data. The steady-state chemical reaction scheme used in the present mathematical model has been validated extensively with experimental data of selective NOx reduction efficiency for a wide range of inlet conditions such as space velocity, oxygen concentrations, water concentration, and NO2/NO ratio. The parametric investigations are performed to examine how the NH3 slip from a SCR DeNOx catalyst and the conversion of NOx are affected by the reaction temperature, NH3/NOx feed ratio, and space velocity for feed gas compositions with NO2/NOx ratios of 0 and 0.5. |
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