公开(公告)号：US11691133B2

公开(公告)日：2023-07-04

申请号：US17312049

申请日：2019-11-11

Applicant: UMICORE SHOKUBAI JAPAN CO., LTD.

Inventor： Tatsuya Kumon ,  Yosuke Goto ,  Franz Dornhaus

IPC: F01N3/28 ,  B01J37/03 ,  B01J35/00 ,  B01J29/74 ,  B01J21/14 ,  B01D53/94

CPC classification number: B01J29/7415 ,  B01D53/944 ,  B01D53/9468 ,  B01J21/14 ,  B01J35/0006 ,  B01J37/038 ,  F01N3/2803 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/9022 ,  B01D2255/9202 ,  F01N2370/04

Abstract: Described are a catalyst capable of effectively oxidizing an exhaust gas, a method for preparing the catalyst, and a method for oxidizing an exhaust gas using the catalyst. The exhaust gas oxidation catalyst includes at least two layers, a lower catalyst layer and an upper catalyst layer, laminated on a three-dimensional structure, wherein the lower catalyst layer and the upper catalyst layer independently contain precious metal and alumina and/or zeolite, and at least a part of the upper catalyst layer contains pores derived from a pore connecting agent with a combustion decomposition temperature of 300° C. or more to less than 450° C.

公开(公告)号：US11344864B2

公开(公告)日：2022-05-31

申请号：US17284953

申请日：2019-11-11

Applicant: UMICORE SHOKUBAI JAPAN CO., LTD.

Inventor： Yosuke Goto ,  Tatsuya Kumon ,  Franz Dornhaus

IPC: B01D53/94 ,  B01J21/14 ,  B01J23/44 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  B01J37/04 ,  B01J37/08 ,  F01N3/28

Abstract: It is an object to provide a catalyst that can effectively purify exhaust gas, in particular, carbon monoxide (CO) in exhaust gas, emitted from a diesel engine, a production method therefor, and an exhaust gas purification method using the same. A diesel engine exhaust gas purification catalyst for purifying exhaust gas emitted from a diesel engine of the present invention comprises a precious metal and alumina and/or zeolite supported on a three-dimensional structure, and has peaks for not less than three different pore sizes in a pore size distribution measured by the mercury intrusion method, wherein one of the peaks is a peak 2 at a pore size of not less than 0.3 μm and less than 1.0 μm, and the pore volume of the peak 2 being greater than 3.1% of the total pore volume.