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모델 가스를 이용한 Pt/Al₂O₃와 Rh/Al₂O₃ 촉매에서의 NOx 변환 특성에 관한 연구
김성현(Sung Hyun Kim),임수철(Su Chol Lim),송순호(Soon Ho Song),전광민(Kwang Min Chun) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study was investigated about NOx reduction by Selective Catalytic Reduction. Selective catalytic reduction of NOx with hydrocabon in the presence of excess oxygen was studied using Ag/Al₂O₃ and platinum metal group. Pt/Al₂O₃ illustrated the maximum 40% of reduction efficiency between 200~250℃. When it compared to Rh/Al₂O₃, it showed 30% of NOx conversion efficiency in another temperature range 300℃. When hydrogen was used as a reductant, Pt/Al₂O₃ achieved the maximum 60% of NOx conversion efficiency in the narrow active temperature range. Reductant mixture of C₃H? and H₂ aids to Pt/Al₂O₃'s wide reaction temperature range. But Rh/Al₂O₃ illustrated 43% of NOx conversion efficiency at 300℃ including narrow active range. Mixture of H₂ and CO did not improve NOx conversion on both Pt/Al₂O₃ and Rh/Al₂O₃.