公开(公告)号：US20180214860A1

公开(公告)日：2018-08-02

申请号：US15419263

申请日：2017-01-30

Applicant: GM Global Technology Operations LLC

Inventor： Gongshin Qi ,  Se H. Oh ,  Ming Yang ,  Ryan J. Day ,  Wei Li

IPC: B01J37/10 ,  B01J23/42 ,  B01J23/44 ,  B01J21/04 ,  B01J35/10 ,  B01J37/08 ,  B01J37/02

CPC classification number: B01J37/10 ,  B01J21/04 ,  B01J23/42 ,  B01J23/44 ,  B01J35/0013 ,  B01J35/002 ,  B01J35/1014 ,  B01J35/1019 ,  B01J35/1038 ,  B01J35/1042 ,  B01J35/1061 ,  B01J37/02 ,  B01J37/0207 ,  B01J37/08

Abstract: A method of stabilizing a catalyst system includes hydrothermally treating an aluminum oxide catalyst support having ≥about 95 volume % of γ-Al2O3 phase by heating to a temperature of about 800° C. to about 1,200° C. in the presence of water. A majority of the γ-Al2O3 is converted to a stable alumina phase selected from the group consisting of: θ-Al2O3, δ-Al2O3, and combinations thereof to form a stabilized porous aluminum oxide support having an average surface area of ≥about 50 m2/g to ≤about 150 m2/g. A platinum group metal is then bound to a surface of the stable porous aluminum oxide support to form the stabilized catalyst systems.

公开(公告)号：US09901907B1

公开(公告)日：2018-02-27

申请号：US15253039

申请日：2016-08-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng Xiao ,  Gongshin Qi ,  Ryan J. Day ,  Ming Yang

IPC: B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/10 ,  B01J21/12 ,  B01J21/14 ,  B01J23/40 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/58 ,  B01J23/60 ,  B01J23/63 ,  B01J35/00 ,  B01J35/02 ,  B01J35/04 ,  B01J37/02 ,  B01J37/16 ,  B01J37/08 ,  F01N3/10 ,  B01D53/94 ,  F01N3/28

CPC classification number: B01J23/44 ,  B01D53/944 ,  B01D53/945 ,  B01D2255/1023 ,  B01D2255/9022 ,  B01J21/04 ,  B01J35/0006 ,  B01J35/0013 ,  B01J37/0201 ,  B01J37/0221 ,  B01J37/088 ,  B01J37/16 ,  F01N3/101 ,  F01N3/103 ,  F01N3/2825 ,  F01N2330/06 ,  F01N2370/02

Abstract: A catalytic converter includes a catalyst. The catalyst includes a support, platinum group metal (PGM) particles dispersed on the support, and metal oxide nanoparticles formed on the support. The metal oxide nanoparticles are dispersed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles.

公开(公告)号：US09855547B2

公开(公告)日：2018-01-02

申请号：US15247230

申请日：2016-08-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gongshin Qi ,  Se H. Oh ,  Wei Li

IPC: B01J21/04 ,  B01J21/06 ,  B01J23/10 ,  B01J23/40 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J37/02 ,  B01J37/08 ,  B01J37/12 ,  B01J35/04 ,  B01D53/94 ,  B01J35/00 ,  F01N3/28 ,  F01N3/10

CPC classification number: B01J23/44 ,  B01D53/944 ,  B01D53/945 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/2065 ,  B01D2255/2092 ,  B01D2255/9022 ,  B01J21/04 ,  B01J23/10 ,  B01J23/63 ,  B01J35/0006 ,  B01J35/04 ,  F01N3/101 ,  F01N3/103 ,  F01N3/2828 ,  F01N2330/06 ,  F01N2370/00 ,  Y02A50/2341 ,  Y02T10/22

Abstract: An example of a catalytic converter includes a catalyst to improve low temperature oxidation of carbon monoxide (CO) and hydrocarbons. The catalyst includes a support, which includes a porous alumina structure and a rare earth metal oxide promoter impregnated into pores of the porous alumina structure. The rare earth metal oxide promoter is selected from the group consisting of CeO2 and CeO2—ZrO2. A platinum group metal (PGM) is bonded to the support.

公开(公告)号：US20170114458A1

公开(公告)日：2017-04-27

申请号：US15276154

申请日：2016-09-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng Xiao ,  Mei Cai ,  Gongshin Qi

IPC: C23C16/455 ,  F01N3/20 ,  C23C16/02

Abstract: In an example of a method for suppressing aging of platinum group metal (PGM) particles in a catalytic converter, PGM particles are applied to a support. A surface of the PGM particles is passivated by exposing the PGM particles to carbon monoxide at a temperature equal to or less than 200° C. to introduce —CO groups to the surface. Atomic layer deposition (ALD) is performed to selectively grow a barrier on the support around the PGM particles.

公开(公告)号：US09597635B2

公开(公告)日：2017-03-21

申请号：US14559983

申请日：2014-12-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gongshin Qi ,  Steven J. Schmieg ,  Shouxian Ren ,  Wei Li

IPC: B01D50/00 ,  B01D53/94 ,  B01J29/12 ,  F01N3/08 ,  F01N3/021 ,  F01N13/00

CPC classification number: B01D53/9431 ,  B01D53/9418 ,  B01D53/9422 ,  B01D53/944 ,  B01D53/9454 ,  B01D53/9477 ,  B01D53/9481 ,  B01D2255/102 ,  B01D2255/104 ,  B01D2255/2092 ,  B01D2255/50 ,  B01D2255/502 ,  B01D2255/504 ,  B01D2255/9032 ,  B01J29/068 ,  B01J29/072 ,  B01J29/126 ,  B01J29/70 ,  B01J35/04 ,  B01J37/0228 ,  B01J37/0244 ,  B01J37/0246 ,  B01J37/04 ,  B01J2229/186 ,  B01J2229/42 ,  F01N3/021 ,  F01N3/0814 ,  F01N3/0842 ,  F01N13/009 ,  F01N2510/063 ,  Y02T10/22

Abstract: An aftertreatment system utilizes chemical reactions to treat an exhaust gas flow. A device for use within an aftertreatment system includes a silver-based NOx storage catalyst and a zeolite. The silver-based NOx storage catalyst and the zeolite store NOx through a low temperature startup period of operation. In one embodiment, the zeolite includes a barium Y zeolite.

公开(公告)号：US08920756B2

公开(公告)日：2014-12-30

申请号：US13664749

申请日：2012-10-31

Applicant: GM Global Technology Operations LLC

Inventor： Calvin K. Koch ,  Gongshin Qi ,  Steven J. Schmieg ,  Wei Li

IPC: B01D53/56

CPC classification number: B01D53/9477 ,  B01D53/9431 ,  B01D53/944 ,  B01D2255/1021 ,  B01D2255/104 ,  B01D2255/2092 ,  B01D2255/91 ,  B01D2258/012 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/2066 ,  Y02A50/2325

Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, in combination with another material selected as a passive NOx adsorber material (PNA), both the silver material and the adsorber material being close coupled to the exhaust manifold of a diesel engine, and upstream of other catalytic devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the flowing exhaust gas stream has heated the PNA and the downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.

Abstract translation: Ag / Al 2 O 3材料可以包装在合适的流通反应器中，与被选择为无源NO x吸附剂材料（PNA）的另一种材料组合，银材料和吸附剂材料都紧密耦合到柴油发动机的排气歧管 ，以及其它催化装置的上游，例如柴油氧化催化剂和用于NOx的选择性还原催化剂。 银催化剂材料在冷启动发动机排气中使用氢气，并且用于在发动机冷起动之后的短时间内在相对低温的含烃废气中将NO氧化为NO 2，并且在起动期间临时储存NOx， 上升期 在流动的废气流已经加热PNA和下游催化装置之后，在NOx排放到大气中之前，银产生其氮氧化物以便通过操作装置转化为氮气。