| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 봄 (04/21 ~ 04/23, 부산 BEXCO) |
| 권호 |
27권 1호, p.1065 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Characteristics of NH3 and N2O formation over Pt substituted commercial three-way catalysts (TWCs) |
| 초록 |
An acute shortage of Pd has pushed its price to the highest level compared to Pt. From a standpoint of commercial application in the aftertreatment system, it is highly desired to identify the TWC performance by the partial substitution of Pt in Pd/Rh TWC while maintaining a constant total loading of PGM. This study characterized formations of byproducts, N2O and NH3 along with the TWC reaction converting CO, HCs and NO. We compared six aged commercial TWCs consisting of the Pd/Rh catalysts and partially substituted Pt TWCs with respect to the location of the catalytic converter (WCC front, WCC rear and UCC). All six TWCs showed nearly 100% conversion of NO to N2 at high temperature (500 ℃), regardless of the presence of Pt. However, in the lower temperature range (200 ~ 400 ℃), formations of N2O and NH3 were strongly affected by the presence of Pt. Pt-substituted Pt/Rh/Pd catalysts showed a superior NO conversion and N2 selectivity compared to the Pd/Rh TWC, regardless of the converter location. This study provides possible application of the Pt substituted TWC with comparable performances in a catalytic converter with reduced cost replacing conventional Pd/Rh based TWC. |
| 저자 |
김도영1, 배우빈1, 변상우1, 윤달영2, 정창호2, 강성봉1
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| 소속 |
1광주과학기술원, 2현대자동차 |
| 키워드 |
촉매 |
| E-Mail |
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| 원문파일 |
초록 보기 |
