DOC-DPF-SCR 시스템에 의한 디젤 배기 내 NO<SUB>x</SUB>, 입자상 물질 저감 과정의 일관 모델링 및 성능 예측 = Unified Modeling and Performance Prediction of NO<SUB>x</SUB> and PM Reduction by COC-DPF-SCR System

다국어 초록 (Multilingual Abstract)

Computer methods employing simplified mathematical models with empirically tuned model parameters can be efficiently practiced into an optimization of a diesel aftertreatment system. Components of prime interests are diesel particulate filter, diesel oxidation catalyst and de-NOx catalytic converter. de-NOx, de-PM, and de-HC processes in each member unit are separately modeled, formulated and then combined into an integrated analysis procedure for a unified prediction of the diesel emission aftertreatment. The unified model is empirically tuned and validated with comprehensive engine and laboratory data. Parametric studies to investigate the effects of emission species and space velocity on the NOx and soot reductions are conducted. A lowered NO₂/NO, ratio after PM oxidation in DPF contributes to promote the NOx reduction by SCR at intermediate gas temperatures. In contrast, NOx reduction is inert to the PM oxidation at high temperatures. Rate of PM accumulation appears to be a strong function of temperature and NOx concentration.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. DPF에서의 입자상 물질 산화 모델링
• 3. NH₃-SCR의 화학 반응 모델링
• 4. DOC 내 NOx 화학 반응 모델링
• 5. DOC-DPF-(NH₃-SCR)시스템에 의한 NO^x와 PM의 저감
• 6. 결론
• 후기
• References