摘要:
A porous ceramic honeycomb body including a substrate of intersecting porous walls forming axial channels extending from a first end face to a second end face. An active portion of the walls include a zeolite catalyst disposed inside pores thereof and/or is comprised of an extruded zeolite and a three way catalyst (TWC) is disposed on wall surfaces of at least a portion of the active portion.
摘要:
The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium + the additional element) : (zirconium) of 43 : 57 to 48 : 52.
摘要:
Provided are processes for the production of particles of catalytic material for emissions control obtainable in one-step from flame spray pyrolysis of precursor-containing dispersion(s), the method comprising: (1) providing a dispersion comprising one or more disperse phases and a continuous phase, the dispersion comprising: (a) a precursor compound of a first platinum group metal and a precursor compound of a first support, and (b) a precursor compound of a second platinum group metal and a precursor compound of a second support, wherein (a) is in a first phase that is different from a second phase containing (b); (2) forming an aerosol of the dispersion provided in step (1); and (3) pyrolyzing the aerosol of step (2) to obtain the particles of catalytic material. The catalytic particles comprise more than one support material and more than one platinum group metal, for use as, for example, three-way conversion (TWC) catalysts.
摘要:
The present disclosure relates to a substrate containing passive NO x adsorption (PNA) materials for treatment of gases, and washcoats for use in preparing such a substrate. Also provided are methods of preparation of the PNA materials, as well as methods of preparation of the substrate containing the PNA materials. More specifically, the present disclosure relates to a coated substrate containing PNA materials for PNA systems, useful in the treatment of exhaust gases. Also disclosed are exhaust treatment systems, and vehicles, such as diesel or gasoline vehicles, particularly light-duty diesel or gasoline vehicles, using catalytic converters and exhaust treatment systems using the coated substrates.
摘要:
본 발명은 백금 및 팔라듐을 포함한 귀금속성분이 담지된 압축천연가스 연소시스템 배기가스 정화용 촉매의 비활성화를 억제하기 위한 촉매조성물을 제공하는 것이다. 구체적으로 팔라듐이 함침된 제1 알루미나, 백금이 함침된 제2 알루미나 및 세리아 성분이 세라믹 담체에 담지되는 압축천연가스 자동차 또는 정치 연소시스템 배기가스 산화촉매에 있어서, 제1 알루미나에는 바륨, 니켈, 란타늄, 사마륨 및 이트륨으로 이루어진 군에서 선택된 조촉매가 담지된 것을 특징으로 하며, 이에 따라 CNG 린번엔진 촉매의 비활성화가 크게 억제된다.
摘要:
A process for the production of mixed oxide particles comprising: (1) providing a dispersion comprising a disperse phase and a continuous phase, wherein the disperse phase comprises one or more precursor compounds of ceria, one or more precursor compounds of zirconia, and one or more precursor compounds of one or more rare earth oxides other than ceria and/or one or more precursor compounds of yttria; (2) forming an aerosol of the dispersion provided in step (1); and (3) pyrolyzing the aerosol of step (2) to obtain mixed oxide particles, as well as to mixed oxide particles obtainable from flame spray pyrolysis, and preferably obtainable by the process and to its use.
摘要:
The present disclosure relates to a substrate comprising nanoparticle catalysts and NO x storage materials for treatment of gases, and washcoats for use in preparing such a substrate. Also provided are methods of preparation of the nanoparticle catalysts and NO x storage materials, as well as methods of preparation of the substrate comprising the nanoparticle catalysts and NO x storage materials. More specifically, the present disclosure relates to a coated substrate comprising nanoparticle catalysts and NO x storage materials for lean NO x trap (LNT) systems, useful in the treatment of exhaust gases.