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비정상 조건에서 자동차용 배기 정화 촉매의 열화 특성 연구
위장현(J. H. Wee),임명택(Myung Taeck Lim) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
For 100 hours down-sized Pd catalytic converters are subject to engine exhaust gas that<br/> changes its states according to a transient fast aging cycles. The equivalence ratio and<br/> temperature of the feed gas are individually adjusted in order to see their influences on the<br/> catalytic conversion efficiency. A Pd-only catalytic converters are fast aged for 100 hours<br/> by lean exhaust gas at the temperatures above 1,000℃, and the conversion efficiencies<br/> during the process are measured and analyzed.
소형촉매를 이용한 자동차용 배기정화 촉매의 열화특성 연구
임옥택(O.T.Lim),위장현(J.H.Wee),임명택(M.T.Lim) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
Down-sized catalytic converters are used to reduce the time and expenses involved in fast aging tests of the automotive catalysts. Small converters are connected to each branches of a manifold. in which flow engine exhaust of different equivalence ratio and temperature. The equivalence ratio and temperature of the feed gas are individually adjusted by applying different levels of insulation and Quantities of secondary air. A Pd-only catalytic converters are fast aged for 50 hours by lean exhaust gas at the temperatures above l,000˚C, and the conversion efficiencies during the process are measured and analyzed. The catalytic converters deteriorate little faster at higher temperature and by leaner exhaust gas. The Pd catalyst seems to be much more durable to aging than Pt/Rh catalyst test earlier.