| 학회 |
한국화학공학회 |
| 학술대회 |
2012년 봄 (04/25 ~ 04/27, 제주 ICC) |
| 권호 |
18권 1호, p.1094 |
| 발표분야 |
촉매 |
| 제목 |
Thermal stability of Rh based TWC catalysts |
| 초록 |
Three-way catalyst (TWC) has been widely employed to remove toxic gases, CO, HCs and NOx emitted from gasoline engines. Noble metals (NMs: Pt, Pd and Rh) play crucial role for TWC reaction as active reaction sites on the surface of TWC. Rh is known to be active component for NOx reduction, while Pt and Pd are employed for primarily removing CO and HCs. Since TWC typically operates at high exhaust gas temperatures, the catalyst is prone to deactivation due to sintering of NMs as well as the thermal degradation of other catalyst components. In addition, Rh supported on alumina can be transformed to Rh aluminate under oxidizing condition at high temperature, resulting in the further loss of its NOx reduction activity. In this work, the effect of thermal aging on the alteration of the physicochemical properties and activities of Rh/metal oxides has been investigated to understand the deactivation of the Rh catalysts. Based upon the findings in the present study, we have designed an advanced TWC system including Rh and Pd, exhibiting improved catalytic activity and stability. |
| 저자 |
허일정1, 윤달영1, 김평순1, 이기환1, 조병권1, 남인식1, 정진우2, 유승범2
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| 소속 |
1포항공과대, 2현대자동차 |
| 키워드 |
TWC; Rh/ZrO2; Catalyst deactivation; NH3 formation; TWC monolith
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| E-Mail |
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| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
