Abstract:
A dual bed catalytic system comprising Ag/Al2O3 and a ZSM-5 zeolite catalyst is provided to obtain an excellent NOx removing effect, wherein the dual bed catalytic system can be used widely as an industrial catalyst for the reduction of NOx released from various types of fixed sources or moving sources at a temperature of at least 300 deg.C. A dual bed catalytic system for the removal of NOx comprises silver(Ag) supported alumina(Al2O3) and a zeolite(ZSM-5). The silver(Ag) supported alumina(Al2O3) and the zeolite(ZSM-5) are stacked in the dual bed catalytic system. The dual bed catalytic system comprises 1 to 5 wt.% of the silver(Ag) supported alumina(Al2O3) and 95 to 99 wt.% of the zeolite(ZSM-5). The zeolite(ZSM-5) has copper(Cu) supported thereon. The copper(Cu) supported zeolite(ZSM-5) comprises 0 to 5 wt.% of copper(Cu) and 95 to 100 wt.% of a zeolite(ZSM-5). The dual bed catalytic system comprises the silver(Ag) supported alumina(Al2O3) and the zeolite(ZSM-5) in a volume ratio range of 4:1 to 1:4. The silver(Ag) supported alumina(Al2O3) is positioned at a front part of a catalytic converter, and the zeolite(ZSM-5) is positioned at a rear part of the catalytic converter. The dual bed catalytic system comprising a hydrocarbon compound having 6 to 16 carbon atoms as a reducing agent.
Abstract translation:提供了包含Ag / Al 2 O 3和ZSM-5沸石催化剂的双床催化体系以获得优异的NOx去除效果,其中双床催化体系可广泛用作用于减少从各种类型的 固定源或移动源,温度至少为300摄氏度。 用于去除NOx的双床催化体系包括银(Ag)负载的氧化铝(Al 2 O 3)和沸石(ZSM-5)。 银(Ag)负载氧化铝(Al2O3)和沸石(ZSM-5)堆叠在双床催化体系中。 双床催化体系包含1至5重量%的银(Ag)负载氧化铝(Al 2 O 3)和95至99重量%的沸石(ZSM-5)。 沸石(ZSM-5)具有负载的铜(Cu)。 铜(Cu)负载的沸石(ZSM-5)包含0-5重量%的铜(Cu)和95-100重量%的沸石(ZSM-5)。 双床催化体系包含体积比为4:1至1:4的银(Ag)负载氧化铝(Al2O3)和沸石(ZSM-5)。 银(Ag)负载氧化铝(Al2O3)位于催化转化器的前部,沸石(ZSM-5)位于催化转化器的后部。 该双床催化体系包含碳原子数为6〜16的烃化合物作为还原剂。
Abstract:
A method for quantitatively analyzing aromatic hydrocarbon absorbed in a catalyst is provided to promptly and reliably evaluate the characteristics and efficiency of the hydrocarbon absorbing catalyst. A method for quantitatively analyzing aromatic hydrocarbon absorbed in a catalyst includes the steps of: passing a gas including the aromatic hydrocarbon through an absorption catalyst to absorb the aromatic hydrocarbon to the absorption catalyst; obtaining a test material from the absorption catalyst and applying a solvent to the test material and shaking the test material to flow out the aromatic hydrocarbon; and measuring the light absorption degree by using an UV light absorption degree.
Abstract:
본 발명은 불균일계 촉매에 흡착된 질소산화물의 정량 분석방법에 관한 것으로서, 더욱 상세하게는 일괄흡착장치를 사용하여 다수의 시료를 동시에 흡착시키는 단계, 용매를 이용하여 흡착된 다수의 시료를 동시에 추출하는 단계, 히드라진을 이용하여 질소산화물을 아질산이온으로 환원시키는 단계 및 개량된 그리스 시약으로 발색시켜 검출 및 정량하는 단계를 포함함으로써, 종래의 방법이 다수의 시료를 정량하기 위해서 하나의 시료를 직렬적(serial)으로 흡착, 세척, 탈착 및 정량분석하고 이런 일련의 과정을 여러 번 반복하는 방법을 사용하여 발생되었던 시간적 또는 비용적 불이익을 현저히 절감시킬 수 있을 뿐만 아니라, 최근에 배기가스의 후처리를 위해 자동차 등에 활발히 적용되는 질소산화물 흡착 촉매의 특성 및 성능을 신속하고 신뢰성 있게 평가할 수 있도록 개선된, 불균일 촉매에 흡착된 질소산화물의 정량 분석방법에 관한 것이다. 불균일계 촉매, 질소산화물, 병렬적(parallel) 정량방법
Abstract:
PURPOSE: A catalyst for zeolite for removing nitrogen oxide, a manufacturing method thereof, and a removing method of the nitrogen oxide are provided to prevent environmental contamination by minimizing the amount of the nitrogen oxide. CONSTITUTION: A catalyst for zeolite for removing nitrogen oxide includes manganese(Mn) 5 ~ 30 weight% and iron 2 ~ 20 weight% as an active material based on the total weight of the catalyst. A manufacturing method of the zeolite catalyst includes a step for supporting the manganese and the iron by using a mixed solution of the manganese and the iron, and a step for sintering the supported catalyst after drying.