Catalyst for reducing nitrogen oxides

• Main Authors: WERTZ AARON, BASU BISWAJIT
• Format: Patent
• Language: Chinese; English
• Published: 19.04.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a catalyst comprising a support substrate of length L and at least two support coatings A and B, where the support coating A comprises 0 alumina; 0 cerium dioxide; 0 alkaline earth metal compounds and/or alkali metal compounds; 0 platinum, palladium or platinum and palladium; the washcoat B comprises a zeolite and palladium, wherein palladium is present as a palladium cation in the zeolite structure or entirely or partially as a palladium metal and/or as a palladium oxide in the zeolite structure and/or on the surface of the zeolite structure; and wherein the washcoat A is arranged underneath the washcoat B. 本发明涉及一种催化剂，所述催化剂包括长度为L的载体基材和至少两个载体涂层A和B，其中·载体涂层A包含○氧化铝；○二氧化铈；○碱土金属化合物和/或碱金属化合物；○铂、钯或铂和钯；·载体涂层B包含沸石和钯，其中钯作为钯阳离子存在于沸石结构中或者完全或部分地作为钯金属和/或作为钯氧化物存在于沸石结构中和/或沸石结构的表面上；并且其中载体涂层A布置在载体涂层B下方。