公开(公告)号：US20240359166A1

公开(公告)日：2024-10-31

申请号：US18682704

申请日：2022-02-08

Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Ki Bong LEE ,  Kwan Young LEE ,  Hyun Wook KIM

IPC: B01J23/89 ,  B01D53/94 ,  B01J21/04 ,  B01J23/42 ,  B01J23/63 ,  B01J35/30 ,  B01J35/61 ,  B01J35/63 ,  B01J37/02 ,  B01J37/08

CPC classification number: B01J23/894 ,  B01D53/9413 ,  B01J21/04 ,  B01J23/42 ,  B01J23/63 ,  B01J23/8926 ,  B01J35/394 ,  B01J35/615 ,  B01J35/635 ,  B01J37/0205 ,  B01J37/0236 ,  B01J37/024 ,  B01J37/08 ,  B01D2255/1021 ,  B01D2255/2065 ,  B01D2255/20761 ,  B01D2255/9207 ,  B01D2257/404 ,  B01D2258/012

Abstract: The present invention discloses a low-temperature nitrogen oxide adsorber based on a metal oxide-impregnated platinum/gamma-alumina catalyst and a method for preparing the same. According to the present invention, the present invention provides a method for preparing a passive nitrogen oxide adsorber for removing nitrogen oxide from a diesel engine, comprising the steps of: (a) impregnating a gamma-alumina support with an aqueous solution of the noble metal catalyst precursor and drying it repeatedly up to a preset number of times; (b) obtaining a noble metal/gamma-alumina catalyst by sintering at a predetermined temperature after step (a) is completed; (c) impregnating the noble metal/gamma-alumina catalyst with an aqueous solution of a metal oxide precursor and drying it repeatedly up to a preset number of times; and (d) preparing a passive nitrogen oxide adsorber composed of Ax-B/γ-alumina by sintering at a predetermined temperature after step (c) is completed, wherein the A is a noble metal catalyst, x is the mass percent of the noble metal catalyst, and the B is a metal.

公开(公告)号：US20210101140A1

公开(公告)日：2021-04-08

申请号：US17002894

申请日：2020-08-26

Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Kwan Young LEE ,  Ki Bong LEE ,  Hyun Wook KIM

IPC: B01J37/03 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J37/08 ,  B01J37/06 ,  B01J23/72 ,  B01J23/02

Abstract: Disclosed are a low-temperature de-NOx catalyst using a ceria-alumina complex support, and a method of manufacturing the same. According to the present invention, provided is a low-temperature de-NOx catalyst using a ceria-alumina complex support, manufactured by impregnating noble metal and metal oxides into a ceria-alumina complex support synthesized by treating a ceria precursor and an alumina precursor in a predetermined mass ratio by a co-precipitation method.