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Catalyst for purifying combustion exhaust gas, and method for purifying combustion exhaust gas
US10112183B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10112183-B2 |
| Application number | US-201515125730-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 23, 2015 |
| Priority date | Mar 24, 2014 |
| Publication date | Oct 30, 2018 |
| Grant date | Oct 30, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
To provide a catalyst for purifying a combustion exhaust gas and a method for purifying a combustion exhaust gas. The denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto, contains zeolite as a support having supported thereon a catalyst metal, in a powder X-ray diffraction (XRD) measurement of the denitration catalyst a ratio (relative peak intensity ratio) r=I/J of a height I of a diffraction peak at a diffraction angle (2θ) of from 7.8 to 10.0° and a height J of a diffraction peak at a diffraction angle (2θ) of from 28.0 to 31.0° being in a range of from 3.0 to 5.0.
First claim
Opening claim text (preview).
The invention claimed is: 1. A denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto, the denitration catalyst comprising zeolite as a support having supported thereon cobalt (Co) as a catalyst metal, in a powder X-ray diffraction measurement of the denitration catalyst a ratio r=I/J of a height I of a diffraction peak at a diffraction angle (2θ) of from 7.8 to 10.0° and a height J of a diffraction peak at a diffraction angle (2θ) of from 28.0 to 31.0° being in a range of from 3.0 to 5.0. 2. The catalyst for purifying a combustion exhaust gas according to claim 1 , wherein the zeolite as a support contains zeolite that has been baked in an inert gas atmosphere in advance. 3. The catalyst for purifying a combustion exhaust gas according to claim 1 , wherein the alcohol as a reducing agent is methanol or ethanol. 4. A method for purifying a combustion exhaust gas, comprising making a combustion exhaust gas having an alcohol as a reducing agent added thereto, into contact with a denitration catalyst containing a support containing zeolite that has been baked in an inert gas atmosphere in advance, having supported thereon cobalt (Co) as a catalyst metal, in a powder X-ray diffraction (XRD) measurement of the denitration catalyst a ratio r=I/J of a height I of a diffraction peak at a diffraction angle (2θ) of from 7.8 to 10.0° and a height J of a diffraction peak at a diffraction angle (2θ) of from 28.0 to 31.0° being in a range of from 3.0 to 5.0, so as to remove a nitrogen oxide in the exhaust gas. 5. The catalyst for purifying a combustion exhaust gas according to claim 2 , wherein the alcohol as a reducing agent is methanol or ethanol.
Assignees
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Classifications
Cobalt · CPC title
- B01J29/072Primary
Iron group metals or copper · CPC title
Operations & Transport · mapped topic
Cobalt · CPC title
Zeolites · CPC title
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Frequently asked questions
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- What does patent US10112183B2 cover?
- To provide a catalyst for purifying a combustion exhaust gas and a method for purifying a combustion exhaust gas. The denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto, contains zeolite as a support hav…
- Who is the assignee on this patent?
- Hitachi Shipbuilding Eng Co
- What technology area does this patent fall under?
- Primary CPC classification B01J29/072. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 30 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).