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    • 46. 发明公开
    • 질소 산화물 저장 촉매의 탈황방법
    • 氮氧化物储存催化剂的脱硫方法
    • KR1020040018228A
    • 2004-03-02
    • KR1020030058510
    • 2003-08-23
    • 우미코레 아게 운트 코 카게
    • 마이클,호프만해럴드,클라인클라우스-인고프리거토마스,클레우저
    • F01N3/10
    • B01D53/9481B01D53/949B01D53/9495F01N3/0814F01N3/0842F01N3/0864F01N3/0885F02D41/028
    • PURPOSE: A desulfurization method of a nitrogen oxide storage catalyst is provided to increase the temperature of the catalyst to the point where thermal desorption of nitrogen oxides stored in the catalyst sets in and to use the onset of thermal desorption of the nitrogen oxides as a signal to enrich the air/fuel mixture. CONSTITUTION: A desulfurization method of a nitrogen oxide storage catalyst containing stored nitrogen oxides and sulfur oxides and being a component of an exhaust gas purification system of a lean-burn engine is composed of steps for increasing the temperature of the catalyst under lean exhaust conditions to a temperature at which thermal desorption of the nitrogen oxides sets in and enriching an air/fuel mixture, wherein the enriching is commenced at the onset of the thermal desorption. The thermal desorption serves as a signal to commence the enriching and accordingly causes desulfurization of the nitrogen oxide storage catalyst.
    • 目的:提供氮氧化物储存催化剂的脱硫方法,以将催化剂的温度升高到存储在催化剂组中的氮氧化物的热解吸附点,并将氮氧化物的热解吸开始用作信号 以丰富空气/燃料混合物。 构成:含有储存的氮氧化物和硫氧化物并且是稀燃燃烧发动机的排气净化系统的组分的氮氧化物储存催化剂的脱硫方法包括以下步骤:在贫排气条件下将催化剂的温度提高到 氮氧化物的热解吸附在其中并使空气/燃料混合物富集的温度,其中在热解吸开始时开始浓缩。 热解吸作为开始浓缩的信号,从而导致氮氧化物存储催化剂的脱硫。
    • 47. 发明公开
    • 질소 산화물 저장 촉매의 재생방법
    • 用于再生氮氧化物储存催化剂的方法
    • KR1020040012561A
    • 2004-02-11
    • KR1020030052995
    • 2003-07-31
    • 우미코레 아게 운트 코 카게
    • 로르프리데만카트빙켈페터페터슈테판디트리히크로이처토마스록스에크베르트
    • B01J38/00B01D53/94F01N3/18
    • F02D41/0275B01D53/9495B01D53/96F01N3/0885F01N2430/06F01N2560/026Y02T10/20
    • PURPOSE: A process and a device for regeneration of a nitrogen oxide storage catalyst in the exhaust system of a diesel engine are provided. CONSTITUTION: The process for regeneration of a nitrogen oxide storage catalyst comprises (a) applying a first regeneration strategy when the exhaust gas temperature is above a threshold temperature, wherein the first regeneration strategy comprises changing a lean air/fuel-ratio to a rich air/fuel-ratio during a first regeneration period; and (b) applying a second regeneration strategy when the exhaust gas temperature is below the threshold temperature, wherein the second regeneration strategy comprises switching the air/fuel-ratio between a lean air/fuel-ratio and a rich air/fuel-ratio back and forth forming a sequence of rich pulses and lean pulses, and the sequence has between 2 and 10 rich pulses and between 2 and 10 lean pulses during a second regeneration period. The device for regeneration of a nitrogen oxide storage catalyst comprises (a) a means for applying a first regeneration strategy when the exhaust gas temperature is above a threshold value, the first regeneration strategy comprising changing the air/fuel-ratio from a lean air/fuel-ratio to a rich air/fuel-ratio value during a first regeneration period; and (b) a means for applying a second regeneration strategy when the exhaust gas temperature is below the threshold value, the second regeneration strategy comprising a means for switching the air/fuel-ratio between a lean air/fuel-ratio and a rich air/fuel-ratio back and forth forming a sequence of rich pulses and lean-pulses with between 2 and 10 rich pulses and between 2 and 10 lean pulses during a second regeneration period.
    • 目的:提供一种在柴油发动机的排气系统中再生氮氧化物储存催化剂的方法和装置。 构成:氮氧化物存储催化剂的再生方法包括(a)当排气温度高于阈值温度时施加第一再生策略,其中第一再生策略包括将稀空气/燃料比改为浓空气 /燃料比; 和(b)当废气温度低于阈值温度时施加第二再生策略,其中第二再生策略包括在稀空气/燃料比和富空燃比之间切换空气/燃料比 并且形成富脉冲和贫脉冲的序列,并且该序列在第二再生期间具有2至10个富脉冲和2至10个贫脉冲之间。 氮氧化物储存催化剂的再生装置包括:(a)当废气温度高于阈值时施加第一再生策略的装置,所述第一再生策略包括从空气/ 在第一再生期间的燃料比与浓空气/燃料比值的关系; 和(b)当废气温度低于阈值时施加第二再生策略的装置,所述第二再生策略包括用于切换稀空燃比与富空气之间的空气/燃料比的装置 /燃料比在第二再生时段期间来回形成富脉冲和贫脉冲序列,其具有2至10个富脉冲和2至10个贫脉冲。
    • 50. 发明公开
    • 귀금속 나노입자, 이의 제조방법 및 이의 용도
    • NOBLE金属纳米颗粒,其制备方法及其用途
    • KR1020020010554A
    • 2002-02-04
    • KR1020010045724
    • 2001-07-28
    • 우미코레 아게 운트 코 카게
    • 스타르츠칼-안톤고이어댄코엘러요아힘베니쉬폴커
    • B82B1/00B82B3/00B82Y30/00
    • B22F1/0022B01J13/0043B01J23/462B01J35/0013B22F1/0018B22F1/0059B22F2998/00B82Y30/00H01M4/8605H01M4/92H01M4/926H01M8/1004Y02P70/56
    • PURPOSE: Provided are noble metal-containing nanoparticles which form stable solutions over a long time due to the use of a suitable, temporary, stabilizer and contain only marginal amounts of impurities (halogen ions, alkali metal ions, borate, etc.), which are insignificant for use in fuel cells. CONSTITUTION: Nanoparticles containing noble metals only or noble metals in combination with base metals are characterized in that they are embedded in an aqueous solution of a temporary stabilizer based on a polysaccharide. A micro layer consists of a mixture of a hydrophobic polymer and carbon black. The micro layer has a microporosity and serves as an intermediate layer between the gas diffusion layer and the catalyst layer of an MEA to improve the electronic connection between both. As shown in the below figure, the noble metal nanoparticles(2) are directly deposited onto the micro layer. Since an electrode backing can withstand much higher temperatures than the polymer membrane(340deg.C instead of only 150deg.C) the temporary stabilizer can be decomposed in this case thermally by heating the coated electrode backing up to a temperature of 250deg.C.
    • 目的:提供含有贵金属的纳米颗粒,由于使用合适的临时稳定剂并且仅含有少量的杂质(卤素离子,碱金属离子,硼酸盐等),长时间形成稳定的溶液,其中 对燃料电池的使用是微不足道的。 构成:仅含有贵金属的纳米颗粒或与贱金属组合的贵金属的特征在于它们嵌入基于多糖的临时稳定剂的水溶液中。 微层由疏水聚合物和炭黑的混合物组成。 微层具有微孔性,并且用作气体扩散层和MEA的催化剂层之间的中间层,以改善两者之间的电子连接。 如下图所示,贵金属纳米粒子(2)直接沉积在微层上。 由于电极背衬可以承受比聚合物膜高得多的温度(340℃而不是仅仅150℃),所以临时稳定剂在这种情况下可以通过将涂覆的电极背衬加热到250℃的温度来分解。