Abstract:
PURPOSE: A post processing device of a diesel vehicle and a recovery method are provided to control reproduction of CPF according to the suction rate and the burnt deposit sampled to a CPF. CONSTITUTION: A post processing device of a diesel vehicle comprises a DOC(diesel oxidation catalyst, 100), a CPF(catalyzed particulate filter, 200), a DM(urea dosing module, 300), and s SCR catalyst(400) and controller(500). The DOC is arranged on top of an exhaust pipe and oxidizes CO, HC, and NO included in the exhaust gas. The CPF is arranged to the downstream side of the DOC. The CPF collects soot and particulate in particulate matter. The controller controls the all operation about purification and recovery of exhaust gas of the post processing device.
Abstract:
A catalyst for purifying gas of an internal combustion device according to an embodiment of the present invention comprises a first catalyst having a carrier and a catalyst layer formed on the carrier wherein the catalyst layer comprises a first supporting body including alumina and Pd carried in the first supporting body; a second catalyst comprising a second supporting body including a ceria-zirconia mixed oxide and Rh carried in the second supporting body; and a third catalyst including a ceria-zirconia mixed oxide and Pd carried in the third supporting body. The catalyst for purifying gas of an internal combustion device according to an embodiment of the present invention has excellent catalyst activity at high temperature.
Abstract:
According to an embodiment of the present invention, a catalyst to purify gas of an internal combustion engine comprises a support and a catalytic layer formed on the support. The catalytic layer comprises: a first catalyst including a first scaffold having alumina and Pd supported on the first scaffold; and a second catalyst including a second scaffold having ceria zirconia composite oxide and Rh supported on the second scaffold. According to an embodiment of the present invention, the catalyst to purify gas of an internal combustion engine exhibits excellent catalytic activity at high temperatures.
Abstract:
PURPOSE: Zeolite catalyst for simultaneously removing carbon monoxide and nitrogen oxide, a manufacturing method thereof, and an exhaust purifier using the same are provided to simultaneously remove carbon monoxide and nitrogen oxide generated from the diesel particulate filter based on Ag and not have to supply urea which is extra reducing agent as carbon monoxide included in the exhaust gas is being used as reducing agent. CONSTITUTION: Zeolite catalyst for simultaneously removing carbon monoxide and nitrogen oxide comprises copper dipped to zeolite by exchanging ion. The amount of the copper is 0.2-2 weight% about the total weight of the catalyst. The manufacturing method of the zeolite catalyst comprises the following steps. A step of performing an ion exchange by mixing salt and copper salt solution; a step of filtering the output of ion exchange, washing and drying with distilled water; and a step of plasticizing dried outcome at 400-600°C for 4-6 hours. [Reference numerals] (AA) CO purification efficiency(%); (BB) Reaction temperature(°C)
Abstract:
본 발명의 실시예에 따른 엔진의 배기시스템은, 엔진에서 배출되는 배기가스가 통과하는 배기라인, 상기 배기라인에 배치되어 배기가스에 포함된 입자상물질을 포집하되, 포집된 입자상물질을 제거하고, 앞부분에서 뒷부분으로 귀금속이 형성되는 디피에프(DPF: diesel particulate filter), 상기 배기라인에서 상기 디피에프의 후단부에 배치되어 환원제를 분사하는 환원제분사장치, 및 상기 환원제분사장치에서 분사된 상기 환원제와 상기 디피에프의 귀금속에 의해서 생성된 이산화질소를 이용하여 질소산화물을 제거하는 선택적촉매환원장치를 포함하되, 상기 디피에프의 상기 앞부분의 단위 부피당 귀금속 함량(g/ft 3 )보다 상기 뒷부분의 단위 부피당 귀금속 함량이 더 크다. 따라서, 디피에프에 귀금속성분이 앞부분과 뒷부분에 각각 형성되고, 상기 앞부분에 형성된 귀금속성분의 양보다 상기 뒷부분에 형성된 귀금속성분의 양을 더 많이 적용하여, 상기 디피에프의 후단부로 이산화질소를 더 발생시켜, 선택적촉매환원장치의 질소산화물 정화효율을 향상시킬 수 있다.
Abstract:
PURPOSE: A device for post-processing exhaust gas for a diesel engine is provided to efficiently eliminate hydrocarbon and carbon monoxide from exhaust gas generated from an engine. CONSTITUTION: A device for post-processing exhaust gas for a diesel engine comprises a Diesel Particulate Filter, a Diesel Oxidation Catalyst, and ammonia Selective Catalyst Reduction. The DPF is arranged in the uppermost of an exhaust pipe connected to an engine exhaust manifold. The DOC is arranged in the bottom side of the DPF and is composed of a carrier with ruthenium or platinum.