• Journal of the korean Society of Automotive Engineers
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• v.13 no.3
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• pp.76-81
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• 1991

1. 서론. 2. 가솔린 자동차. 3. 디젤 자동차. 4. 메탄올 엔진. 5. 결어 자동차 보유대수가 급격히 증가하고 대도시에서의 평균속도가 매년 떨어지며 가솔린의 유황 및 납 함량이 매우 높은 우리의 실정에서는 기존의 삼원촉배에서 귀금속사용량을 줄이고 급격한 가속이나 비정상적인 운전에 의하여 삼원촉매의 용융 및 파괴가 일어나지 않도록 내열성, 내충격성 및 소결성이 우수한 삼원촉매를 개발하며 연료속에 포함된 높은 농도의 피독물질에 의하여 삼원촉매의 성능이 떨어지지 않도록 하는 삼원촉매에 대한 연구가 필요하다. 또한 삼원촉매를 테스트하는 우리의 실정에 맞는 driving cycle의 확립과 이를 시뮬레이션 할 수 있는 모델의 개발도 시도되어야 한다.

• Resources Recycling
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• v.23 no.1
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• pp.3-16
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• 2014

Recycling of spent autocatalyst that includes the platinum group metals (PGMs), namely palladium, platinum and rhodium, is a very profitable endeavor. In order to ensure an efficient promotion of an appropriate policy-making and the technical development of the recycling process of spent autocatalyst in Korea, the generated amount, trading conditions, and recycling technology for spent autocatalyst were surveyed. The generated amount of spent autocatalyst was estimated by analyzing the domestic statistical data of registration & disuse of automobiles and the records of autocatalyst installation to new cars. The review of the recycling technology was carried out by surveying the recycling processes of 'Heesung PMTech Ltd.', which is the largest company in the recycling industry for spent autocatalyst in Korea. In addition to the above, some policy suggestions for the improvement of recycling industries for spent autocatalyst were offered.

• Journal of the korean Society of Automotive Engineers
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• v.17 no.2
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• pp.1-6
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• 1995

천연가스 자동차의 배출가스 정화특성은 가솔린보다 우수하며 대기오염물질이 전반적으로 매우 낮아 천연가스 자동차의 저공해성을 확인할 수 있다. 이를 위한 촉매개발 기술에서는 Pb촉매가 메탄의 산화에 유리하며, 촉매구조는 Single-bed 보다 Dual-bed type이 메탄의 정화율에 유리하다는 것을 알았다. 각종 배기성분의 공존영향에서는 공존하는 NOx, H$_{2}$O가 메탄의 산화반응을 억제하는 요인으로 작용함을 알았다. 그리고, 천연가스 전용촉매는 초기 내구성이 급격히 저하하는 특성이 있는데, 이는 Lanthanoid 조촉매를 사용하므로써 개선의 가능성을 보이고 있다.

• Journal of Korean Society of Environmental Engineers
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• v.22 no.5
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• pp.819-825
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• 2000

The physico-chemical characteristics and the combustion activities of a waste automotive catalyst were carried out in this study. The physico-chemical characteristics of waste automotive catalyst was examined by EA(Elemental analysis), ICP-AES (Inductively coupled plasma-atomic emission spectrophotometer), and XRD(X-ray diffraction) analysis. Carbon deposit amount was higher in front brick than rear brick of catalyst, and increased with mileage. The content of Pt. Pd and Rh in waste automotive catalyst was different from the car manufacturing company. The combustion activities of waste automotive catalyst were investigated for acetaldehyde as a model VOC in a fixed bed reactor at atmospheric pressure. The catalytic activity of rear brick for acetaldehyde combustion was better than front brick of waste automotive catalyst. The catalytic activity of waste automotive catalyst for acetaldehyde combustion decreased with mileage. The linear relationship between catalytic activity and mileage was negative and has a very excellent correlation. Finally, the waste automotive catalyst has a good catalytic activity for acetaldehyde combustion. and can be used to control of small emission source.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.04a
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• pp.231-232
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• 2000

자동차 보급의 증가에 의한 심각한 대기오염으로 인하여 국내 제작차(휘발유 자동차)의 경우 1987년부터 자동차 배기가스 정화용 촉매 전환기의 장착을 의무화하였다(환경부, 1998). 자동차용 촉매로 많이 사용되는 귀금속은 백금(Pt), 팔라듐(Pd), 로듐(Rh)이며, 수요비율은 백금이 전체 수요의 39%, 팔라듐이 16%, 로듐이 96%로 자동차용으로 많은 귀금속이 사용되고 있음을 알 수 있다. (중략)

• Journal of the korean Society of Automotive Engineers
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• v.9 no.2
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• pp.5-11
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• 1987

선진국에서 사용되고 있는 자동차 배기정화 장치의 성능평가 시험방법은(CVS테스트, 유럽테스트, 일본테스트법 등)배기정화용 3원촉매 뿐만 아니라 그 부수장치의 성능을 포함한 포괄적인 평가방 법이므로 그 결과에 미치는 인자가 대단히 복잡하고 평가비용과 시간도 크게 드는 결점이 있어 서, 3원촉매만의 특성평가와 새로운 촉매의 연구개발의 방향을 추출하기 위하여서는 개선된 새로 운 성능 평가방법이 요구되고 있다. 이에 부응하여 모조합성 배기가스를 이용환 촉매성능측정장 치로부터 실제 엔진배기사스 측정장치에 이르까지 많은 평가시험 방법이 제안되었으나 아직 이러 한 시험방법에 의한 결과와 해석에 대하여서는 많은 관찰의 소지를 남기고 있는 것으로 보고 되 고 있다. 따라서, 본고에서는 기존상업적 3원촉매 뿐만 아니라 앞으로 연구 개발될 새로운 3원 촉매의 특성 및 성능평가에 관하여 미국, 일본 등을 포함한 선진제국의 현행 평가방법을 주로 초기단계에서 제안된 일본자동차연구소 연구보고 중심으로 하여 고찰하고자 한다.

• Applied Chemistry for Engineering
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• v.19 no.5
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• pp.574-581
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• 2008

The optimum regeneration conditions for the regeneration of three way spent catalysts (TWCs), which were taken from automobiles with different driving conditions, were investigated to evaluate the suitability as alternative catalysts for removing VOCs. The spent catalysts were washed with five different acids ($HNO_3$, $H_2SO_4$, $C_2H_2O_4$, $C_6H_8O_7$, and $H_3PO_4$) to remove contaminants and examine the optimum conditions for recovering the catalytic activity. The physicochemical properties of spent and its regenerated TWCs were evaluated by using nitrogen adsorption-desorption isotherms, XRD, and ICP. The relative atomic ratios of contaminants and platinum group metals (PGMs) of the spent TWCs were greatly dependent on the placed positions. The main contaminants formed were lubricant oil additives and metallic components. Also, the regeneration treatment increased the PGMs ratio, BET surface area, and average pore diameter of TWCs. The catalytic activity results indicated that the spent TWCs have the possibility for removing VOCs. Moreover, the employed acid treatments greatly enhanced the catalytic activity of the spent TWCs. Especially, nitric and oxalic acids provided the most improvement in the catalytic behavior. The catalytic activities of the regenerated TWCs were significantly influenced by the containing platinum ratios rather than the removal ratios of contaminants and the changes in the structural properties offered by the acid treatments.

• Journal of the korean Society of Automotive Engineers
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• v.16 no.4
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• pp.6-22
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• 1994

본 연구에서는 각각의 대체에너지 차량과 기타 저공해과제(촉매기술 등)에서 구체적인 재료의 역할을 알아본다. 1. 메타놀 차량. 2. 전기자동차. 3. 천연가스 차량. 4. 촉매기술. 5. 저공해 차량의 여러 고려사항.

• Applied Chemistry for Engineering
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• v.20 no.4
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• pp.430-436
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• 2009

Deactivated three-way catalysts which had been exposed to gasoline engine exhaust for a long time were remanufactured by ultra sonic cleaning with distilled water, sulfuric acid solution and impregnation with precious metals (Pt, Pd, Rh). The catalytic properties as well as conversion reactivity of CO, THC and NOx about fresh, aged and remanufactured catalysts were examined. Most of the pollutants deposited on the aged three-way catalysts were removed in the remanufacturing process of those catalysts. At the same time a little amount of precious metals like Pt and Pd were removed in the remanufacturing process. Under the experimental condition used in this study, in the case of the remanufactured catalysts with impregnation of precious metals, the catalytic activities were recovered to almost the same level, or higher level of that of the fresh catalyst.

• Transactions of the Korean Society of Automotive Engineers
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• v.10 no.1
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• pp.45-50
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• 2002

Use of a phenomenological model, developed far prediction of catalytic deactivation, is demonstrated in comparing harshness of different driving cycles that are currently used to rapidly age catalytic converters on engine test benches. The model shows that seemingly equivalent driving cycles cause the catalytic converters to reach significantly different levels of deactivation. The comparison of the model prediction with the limited vehicle data seems encouraging despite the simplicity of the model at the current stage of its infancy.