Reducing agent tank and work vehicle
US-2015377112-A1 · Dec 31, 2015 · US
Aldehyde decomposition catalyst, and exhaust gas treatment apparatus and exhaust gas treatment method
US11224839B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11224839-B2 |
| Application number | US-202016773310-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 27, 2020 |
| Priority date | Nov 12, 2014 |
| Publication date | Jan 18, 2022 |
| Grant date | Jan 18, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
One object is to provide a useful aldehyde decomposition catalyst, and an exhaust gas treatment apparatus and an exhaust gas treatment method using the aldehyde decomposition catalyst that achieve low cost and sufficient aldehyde decomposition performance with a small amount of the catalyst. An aldehyde decomposition catalyst of the present invention is made of a zeolite in a cation form NH4 having a structure of CHA or MOR and carrying Cu.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for decomposing an aldehyde contained in a combustion exhaust gas discharged from a denitration unit, the denitration unit removing NOx from the combustion gas, the aldehyde being by-produced in the denitration unit to which an alcohol is fed as a reducing agent, the method comprising a step of contacting the aldehyde with an aldehyde decomposition catalyst, characterized in that the aldehyde decomposition catalyst is made of a zeolite in a cation form NH 4 having a structure of CHA and carrying Cu. 2. The exhaust gas treatment method according to claim 1 , in which the temperature range of the combustion exhaust gas is from 200 to 400° C. 3. The exhaust gas treatment method according to claim 1 , wherein the aldehyde contained in the combustion exhaust gas is formaldehyde. 4. A method for decomposing an aldehyde contained in a combustion exhaust gas discharged from a denitration unit, the denitration unit removing NOx from the combustion gas, the aldehyde being by-produced in the denitration unit to which an alcohol is fed as a reducing agent, the method comprising a step of contacting the aldehyde with an aldehyde decomposition catalyst, characterized in that the aldehyde decomposition catalyst is made of a zeolite in a cation form NH 4 having a structure of MOR and carrying Cu, wherein the aldehyde contained in the combustion exhaust gas is formaldehyde.
Assignees
Inventors
Classifications
- B01D53/90Primary
Injecting reactants · CPC title
- B01J29/76Primary
Iron group metals or copper · CPC title
for rendering innocuous (using electric or electrostatic separators F01N3/01; chemical aspects B01D53/92) · CPC title
Organic compounds not provided for in groups B01D2251/206 or B01D2251/208 · CPC title
for use in transportation means · CPC title
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- What does patent US11224839B2 cover?
- One object is to provide a useful aldehyde decomposition catalyst, and an exhaust gas treatment apparatus and an exhaust gas treatment method using the aldehyde decomposition catalyst that achieve low cost and sufficient aldehyde decomposition performance with a small amount of the catalyst. An aldehyde decomposition catalyst of the present invention is made of a zeolite in a cation form NH4 ha…
- Who is the assignee on this patent?
- Hitachi Zosen Corp
- What technology area does this patent fall under?
- Primary CPC classification B01D53/90. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 18 2022 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).