Abstract:
본 발명은 산화 금속 지지체에 Rh을 담지한 촉매를 적용하여 이론 공연비(A/F=14.7) 이상의 연료가 희박한 배기가스 조건에서도 질소산화물을 암모니아로 전환시킬 수 있는 질소산화물의 암모니아 전환용 촉매 및 이의 제조방법을 제공하는데 그 목적이 있다. 상기와 같은 목적을 달성하기 위해 본 발명에 따른 질소산화물의 암모니아 전환용 촉매는 귀금속이 담지된 산화 금속 지지체를 포함하여, 이론 공연비(A/F=14.7) 이상의 연료가 희박한 배기가스 조건에서도 질소산화물을 암모니아로 전환시킬 수 있도록 된 것을 특징으로 한다.
Abstract:
The present invention relates to a perovskite catalyst for NO oxidation and a manufacturing method thereof and, in particular, to a perovskite catalyst for NO oxidation and a manufacturing method thereof capable of accelerating the usage of the perovskite catalyst for NO oxidation and reducing production costs owing to the excluded use of precious metals because the perovskite catalyst for NO oxidation can be used as a main component of an aftertreatment system for reducing NOx in exhaust gas of a leanburn gasoline engine or a diesel engine by producing the perovskite catalyst including silver (Ag) having the function of NO oxidation and excellent hydrothermal stability. The perovskite catalyst for NO oxidation is the core technology of an aftertreatment system for vehicle exhaust gas which can be used for an eco-friendly low-pollution vehicle to react to environmental restrictions in the WTO system. [Reference numerals] (AA) Pt-based commercial catalyst
Abstract:
PURPOSE: A reduction method of nitrogen oxide effectively returns nitrogen oxide to nitrogen and presents excellent nitrogen oxide reduction efficiency. CONSTITUTION: A reduction method of nitrogen oxide comprises a step of injecting a reducing agent including an amine compound and exhaust gas including nitrogen oxide to a catalyst system. The catalyst system includes a carrier alumina (Ag/Al2O3) catalyst. The amine compound is selected one from a group of monoethanolamine, ethylamine and their combination. [Reference numerals] (AA) Example 1 (Monoethanolamine); (BB) Example 1 (Ethylamine); (CC) Comparative example 1 (Ethanol + Ammonia); (DD) Comparative example 2 (Ethanol); (EE) Comparative example 3 (Ammonia)
Abstract translation:目的:氮氧化物的还原方法有效地将氮氧化物返回到氮气中,具有优异的氮氧化物还原效率。 构成:氮氧化物的还原方法包括将包含胺化合物的还原剂和包括氮氧化物的废气注入催化剂体系的步骤。 催化剂体系包括载体氧化铝(Ag / Al 2 O 3)催化剂。 胺化合物选自一种单乙醇胺,乙胺及其组合。 (AA)实施例1(单乙醇胺); (BB)实施例1(乙胺); (CC)比较例1(乙醇+氨); (DD)比较例2(乙醇); (EE)比较例3(氨)
Abstract:
The present invention relates to a deposition catalyst for reducing nitrogen oxide, a method for producing the same, and a method for removing nitrogen oxide using the same. More specifically, the present invention relates to a deposition catalyst having excellent removal efficiency of nitrogen oxide at a temperature of 270 to 400°C which is the actual exhaust gas temperature; a method for producing the same; and a method for removing nitrogen oxide from exhaust gas using the deposition catalyst and a reducing agent.
Abstract:
본 발명은 기존 가솔린 자동차 엔진에서 발생하는 질소산화물 (NOx) 저감 성능 개선을 위한 삼원 촉매(THREE-WAY CATALYST, TWC)-SCR 촉매 시스템의 암모니아 (NH 3 ) 생성용 삼원 촉매(THREE-WAY CATALYST, TWC) 개발에 관한 내용이다. 특히 삼원 촉매(THREE-WAY CATALYST, TWC)의 주요 구성원인 귀금속 (noble metal)의 대체 없이 기존 시스템을 유지하면서 삼원 촉매(THREE-WAY CATALYST, TWC)를 산화열처리 후 암모니아 생성량 증대 및 지지체에 따른 NH 3 생성량 변화 확인을 통한 NH 3 생성 최적 촉매 개발이 본 발명의 주요 착안점이다.
Abstract:
PURPOSE: A manufacturing method of three-way catalyst producing ammonia for passive ammonia/selective catalytic reduction and a tree-way catalyst manufactured by the same are provided to be effectively used for environmentally-friendly automobiles. CONSTITUTION: A catalyst for reducing nitrogen oxide into ammonia is carried in a metal oxide carrier. A manufacturing method of the catalyst includes a step for thermally treating noble metal powder carried in the metal oxide carrier in the process of manufacturing a three-way catalyst based on an impregnation method. The noble metal is rhodium(Rh). The metal oxide support is Al2O3, SiO2, ZrO2, CeO2, C3Z1(Ce0.75Zr0.25O2), or the mixture. The noble metal carried in the carrier is thermally treated at 800-1,200 deg. C. The weight ratio of the noble metal impregnated in the metal oxide carrier is 0.01-1 weight%. [Reference numerals] (AA) NH3 productivity(ppm)