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.

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.

고순도 수소 생산을 위한 CO 선택적 산화 반응용 Pt 촉매 연구

전경원,정대운,장원준,나현석,노현석 한국수소및신에너지학회 2013 한국수소 및 신에너지학회논문집 Vol.24 No.5

To develop preferential CO oxidation reaction (PROX) catalyst for small scale hydrogen generation system, supported Pt catalysts have been applied for the target reaction. The supports were systematically changed to optimize supported Pt catalysts. Pt/Al2O3 catalyst showed the highest CO conversion among the catalysts tested in this study. This is due to easier reducibility, the highest dispersion, and smallest particle diameter of Pt/Al2O3. It has been found that the catalytic performance of supported Pt catalysts for PROX depends strongly on the reduction property and depends partly on the Pt dispersion of supported Pt catalysts. Thus, Pt/Al2O3 can be a promising catalyst for PROX for small scale hydrogen generation system.

나노기공성 물질을 이용한 메탄개질 및 수소분리용 연속반응시스템 설계 및 평가

배종수(Bae, Jong-Soo),박주원(Park, Joo-Won),김재호(Kim, Jae-Ho),이재구(Lee, Jae-Goo),최영찬(Choi, Young-Chan),한춘(Han, Choon) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06

아직까지 국내에서 사용하는 대부분의 에너지는 화석연료에 의존하고 있다. 지하자원에서 나오는 석탄, 석유와 같은 화석연료는 다른 에너지원에 비해 운송이 간편하고 쉽게 이용할 수 있는 장점이 있지만, 환경오염의 문제성과 오일가상승, 자원의양 및 저장장소가 한정되어 있다는 단점을 가지고 있다. 이에 따라 수소와 같은 대체에너지를 이용하여 환경오염을 예방하고 무한히 사용할 수 있는 에너지원을 개발하기 위한 대체 방안들이 연구되고 있다. 폐기물 가스화시 발생되는 합성가스(CO, CO₂, CH₄, H₂) 내 일차로 생성된 일산화탄소는 수증기와 반응함으로써 이산화탄소로 전환이 가능하다. 잔류 메탄은 이산화탄소를 이용하여 개질함으로써 합성가스내 수소농도를 높일 수 있다. 전환된 잔류가스(CO, CO₂, H₂)내 일산화탄소는 산소를 이용하여 이산화탄소로 산화시킬 수 있으며, 산화된 이산화탄소는 흡착제를 이용하여 제거가 가능하다. 본 연구에서는 실제 가스화시 발생되는 합성가스를 이용하기 위하여, RPF가스화시 발생되는 합성가스를 직접 포집하여 실험을 진행하였다. 합성가스내 소량의 메탄은 니켈촉매를 이용하여 수소로 전화시켰으며, 잔류하는 일산화탄소는 백금촉매, 이산화탄소는 탄산나트륨 흡착제를 이용하여 연속적으로 제거함으로써 순수한 수소를 제공하였다.

수소를 이용한 멀티채널 CDPF의 입자상물질 재생 특성에 대한 선행 연구

박군철(Kun Chul Park),전광민(Kwang Min Chun),송순호(Soonho Song) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11

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℃. Hydrogen can be used to reduce the regeneration temperature of a DPF. The oxidation characteristics of PM with hydrogen supplied to CDPF were studied using a partial flow system. The partial flow system was used to control temperature and flow rate independently. The CDPF was coated with Pt/Al₂O₃ 25g/ft³, and a multi-channel CDPF(MC CDPF) was used. The soot regeneration experiments were performed to investigate the effect of hydrogen exothermic reaction on soot oxidation in the CDPF. For this purpose, before oxidation experiment, PM was collected about 8g/L to the CDPF at engine condition of 1500rpm, bmep 8bar and partial flow temperature of 200℃. We tested for a wide range of temperature and concentration of hydrogen. Regeneration of soot in the CDPF started when H2 concentration was 4% and inlet temperature was 120℃. Regeneration becomes faster when H2 concentration was higher.

수소와 일산화탄소를 이용한 멀티채널 CDPF의 재생특성에 관한 연구

최광춘(Kwang Chun Choi),전광민(Kwang Min Chun),송순호(Soonho Song) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

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 regenerate the Catalyzed DPF(CDPF). The syngas was made by CPOx(Catalyzed Partial Oxidation) at reformer, that of mainly helpful component at DPF regeneration is hydrogen and carbon-monoxide. We use the hydrogen and carbon-monoxide model gas for regeneration characteristic of filter regeneration. The oxidation characteristics of PM with model gas 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 DPF regeneration experiments were performed to investigate the effect of syngas exothermic reaction on soot oxidation in the filter. 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 H₂, CO gas were used for the tests. Regeneration of soot in the filter started at 2% H₂ and CO concentration respectively and inlet temperature of 250℃. Filter Regeneration occurs more actively as the model gas concentration becomes higher.

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.