公开(公告)号：US20170274321A1

公开(公告)日：2017-09-28

申请号：US15503903

申请日：2015-10-21

Applicant: BASF CORPORATION

Inventor： Xiaolai Zheng ,  Chunxin Ji ,  Wen-Mei Xue ,  Matthew J. Schladt ,  Xiaoming Wang ,  Tian Luo ,  Michel Deeba ,  Knut Wassermann

IPC: B01D53/94 ,  B01J29/70 ,  B01J29/76 ,  B01J23/56

CPC classification number: B01D53/945 ,  B01D53/9418 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2042 ,  B01D2255/2065 ,  B01D2255/20715 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2255/50 ,  B01D2255/502 ,  B01D2255/9022 ,  B01D2255/912 ,  B01D2255/9207 ,  B01J23/56 ,  B01J23/63 ,  B01J29/005 ,  B01J29/40 ,  B01J29/46 ,  B01J29/7007 ,  B01J29/76 ,  B01J29/7615 ,  B01J29/763 ,  B01J29/80 ,  B01J29/85 ,  B01J35/0006 ,  B01J37/0244 ,  B01J37/0246 ,  B01J2523/00 ,  Y02T10/24 ,  B01J2523/25 ,  B01J2523/31 ,  B01J2523/37 ,  B01J2523/3712 ,  B01J2523/48 ,  B01J2523/824 ,  B01J2523/822 ,  B01J2523/828

Abstract: An emissions treatment system for an exhaust stream of an internal combustion engine including hydrocarbons, carbon monoxide, and nitrogen oxides is provided. The disclosed system can include an exhaust conduit in fluid communication with the internal combustion engine via an exhaust manifold; a first three-way conversion catalyst (TWC-1) located downstream of the internal combustion engine in the exhaust conduit; an SCR-HCT catalyst comprising a selective catalytic reduction catalyst and a hydrocarbon trap downstream of the TWC-1 in the exhaust conduit; and a third catalyst downstream of the SCR-HCT combination in the exhaust conduit, the third catalyst comprising a platinum group metal (PGM) e.g., in an amount effective to oxidize hydrocarbons. Methods of making and using such systems and components thereof are also provided.

公开(公告)号：US20150367337A1

公开(公告)日：2015-12-24

申请号：US14741756

申请日：2015-06-17

Applicant: BASF Corporation

Inventor： Xiaofan Yang ,  John K. Hochmuth ,  Wen-Mei Xue ,  Xiaoming Wang ,  Matthew Tyler Caudle ,  Ahmad Moini ,  Dustin O. Hollobaugh ,  Qi Fu ,  Michael Breen

IPC: B01J29/76 ,  B01D53/94 ,  B01J35/04 ,  B01J29/72

Abstract: Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150 to 650° C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150° C. to 600° C., and the SCR catalyst material is effective to store ammonia at temperatures of 400° C. and above. A method for selectively reducing nitrogen oxides, and a method for simultaneously selectively reducing nitrogen oxide and storing ammonia are also described. Additionally, an exhaust gas treatment system is also described.

Abstract translation: 描述了包含硅和铝原子的沸石骨架材料的选择性催化还原催化剂，其中一部分硅原子被四价金属同晶取代。 催化剂可以包括促进剂金属，使得催化剂有效地促进氨与氮氧化物的反应，以在150至650℃的温度范围内选择性地形成氮和H 2。另一方面，描述了选择性催化还原复合材料，其包含 SCR催化剂材料和包含具有IV氧化态的过渡金属的氨储存材料。 SCR催化剂材料促进氨与氮氧化物的反应，在150℃至600℃的温度范围内选择性地形成氮和H2O，SCR催化剂材料在400℃的温度下有效储存氨。 以上。 还描述了选择性还原氮氧化物的方法，以及同时选择性地还原氮氧化物和储存氨的方法。 此外，还描述了废气处理系统。