Invention Grant
- Patent Title: Exhaust gas purification material
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Application No.: US16014979Application Date: 2018-06-21
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Publication No.: US10335736B2Publication Date: 2019-07-02
- Inventor: Makoto Tsuji , Hiroto Imai , Shintaro Kobayashi
- Applicant: CATALER CORPORATION
- Applicant Address: JP Kakegawa
- Assignee: CATALER CORPORATION
- Current Assignee: CATALER CORPORATION
- Current Assignee Address: JP Kakegawa
- Agency: Oliff PLC
- Priority: JP2013-255818 20131211
- Main IPC: B01D53/94
- IPC: B01D53/94 ; B01J29/76 ; B01J35/04 ; F01N3/035 ; F01N3/20 ; F01N3/08

Abstract:
An exhaust gas purification material according to the present invention is provided with a particulate filter 10 that traps particulate matter in exhaust gas and contains an SCR catalyst for adsorbing ammonia and reducing NOx in the exhaust gas. A maximum allowable adsorption amount of ammonia adsorbable by the filter 10 differs between an upstream portion 10a of the filter 10 including an exhaust gas inlet-side end 10c, and a downstream portion 10b of the filter 10 including an exhaust gas outlet-side end 10d. The SCR catalyst contained in the upstream portion 10a and the SCR catalyst contained in the downstream portion 10b are qualitatively different. A ratio (B/A) of a maximum allowable adsorption amount of ammonia A in the upstream portion 10a and a maximum allowable adsorption amount of ammonia B in the downstream portion 10b satisfies the relationship 1.1≤(B/A)≤2.
Public/Granted literature
- US20180296979A1 EXHAUST GAS PURIFICATION MATERIAL Public/Granted day:2018-10-18
Information query
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