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RISS 인기검색어
- 검색키워드
- 주제어 : Pt/CeO₂(백금-세리아) (검색결과 2 건)
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연료 개질 모델 가스를 이용한 Pt-based 촉매에서의 NOx 변환 특성에 관한 연구
임수철(Suchol Lim),이경택(Kyungtaek Lee),송순호(Soonho Song),전광민(Kwang Min Chun) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This experiment was conducted by using Pt/Al₂O₃, Pt/SiO₂ and Pt/CeO₂ catalysts with C₃H?, H₂, CO and their mixtures in with and without H₂O conditions. When reductant condition was C₃H? 2400ppmC₁, Pt/Al₂O₃ and Pt/SiO₂ catalysts showed maximum NOx conversion efficiency 45% at 250℃ 53% at 250℃, 14% at 400℃ respectively without H₂O conditions, In H₂ 2400ppm condition, more than 200℃, NOx conversion efficiency was decreased in the order of Pt/SiO₂, Pt/CeO₂, Pt/Al₂O₃, on the other hand, Pt/CeO₂ catalyst showed maximum 35% NOx conversion in 250℃. In mixture of C₃H? 1200ppmC₁ and H₂ 1200ppm condition, in 200℃, Pt/Al₂O₃, Pt/SiO₂, Pt/CeO₂ showed maximum 45%, 53%, 15% NOx conversion respectively, Especially Pt/Al₂O₃ catalyst showed wide temperature range. Experiments was conducted in a several ratio between H₂ and CO. Conclusion is that addition of CO is generally deactivation factor in NOx conversion. Compare with and without H₂O condition in a ratio between H₂ and CO, inclusion of H₂O is deactivation factor in NOx conversion.
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합성가스(Reforming gas)를 이용한 멀티채널 CDPF의 재생 특성 연구
최광춘(Kwang Chun Choi),정진화(Jinhwa Chung),송순호(Soonho Song),전광민(Kwang Min Chun) 한국자동차공학회 2011 한국 자동차공학회논문집 Vol.19 No.3
Diesel particulate filter (DPF) systems are being used to reduce the particulate matter emission of diesel vehicles. The DPF should be regenerated after certain driving hours or distance to eliminate soot in the filter. The most widely used method is active regeneration with oxygen at 550~650℃. Syngas (synthetic gas) can be used to lower the regeneration temperature of Catalyzed DPF (CDPF). The syngas is formed by fuel reforming process of CPOx (Catalytic Partial Oxidation) at specific engine condition (1500rpm, 2bar) using 1wt.% Rh/CeO₂-ZrO₂ catalyst. The oxidation characteristics of PM with syngas supplied to filter were studied using partial flow system that can control temperature and flow rate independently. The filter is coated with washcoat loading of 25g/ft³ Pt/Al₂O₃-CeO₂, and multi-channel CDPF (MC-CDPF) was used. The filter regeneration experiments were performed to investigate the effect of syngas exothermic reaction on soot oxidation in the filter. For this purpose, before oxidation experiment, PM was collected about 8g/L to the filter at engine condition of 1500rpm, bmep 8bar and flow temperature of 200℃. Various conditions of temperature and concentration of syngas were used for the tests. Regeneration of filter started at 2% H₂ and CO concentration respectively and inlet temperature of 260℃. Filter Regeneration occurs more actively as the syngas concentration becomes higher.
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