연료 개질 모델 가스를 이용한 Pt-based 촉매에서의 NOx 변환 특성에 관한 연구

다국어 초록 (Multilingual Abstract)

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.