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Urea hydrolysis reactor for selective catalytic reduction
US9849444B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9849444-B2 |
| Application number | US-201514672968-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 30, 2015 |
| Priority date | Sep 15, 2014 |
| Publication date | Dec 26, 2017 |
| Grant date | Dec 26, 2017 |
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- Title
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Abstract
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This disclosure features a urea conversion catalyst located within a urea decomposition reactor (e.g., a urea decomposition pipe) of a diesel exhaust aftertreatment system. The urea conversion catalyst includes a refractory metal oxide and a cationic dopant. The urea conversion catalyst can decrease the temperature at which urea converts to ammonia, can increase the urea conversion yield, and can decrease the likelihood of incomplete urea conversion.
First claim
Opening claim text (preview).
The invention claimed is: 1. A coating composition for a urea decomposition reactor, comprising: a dispersion comprising a urea conversion catalyst comprising a refractory metal oxide and a cationic dopant, between 0.001 wt % and 15 wt % poly(ethylene glycol)-co-poly(propylene glycol) copolymer; an inorganic oxide binder particle; a high molecular weight hydrophilic polymer viscosity aid; and a solvent. 2. The coating composition of claim 1 , wherein the dispersion comprises between 2 wt % and 50 wt % refractory metal oxide. 3. The coating composition of claim 1 , wherein the dispersion comprises between 0.001 wt % and 30 wt % cationic dopant. 4. The coating composition of claim 1 , wherein the composition comprises between 0.001 wt % and 5 wt % high molecular weight hydrophilic polymer viscosity aid. 5. The coating composition of claim 1 , wherein the dispersion is a colloidal dispersion.
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Classifications
of rare earths · CPC title
- B01J23/83Primary
with rare earths or actinides · CPC title
- B01D53/9431Primary
Processes characterised by a specific device · CPC title
Titanium; Oxides or hydroxides thereof · CPC title
from urea · CPC title
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- What does patent US9849444B2 cover?
- This disclosure features a urea conversion catalyst located within a urea decomposition reactor (e.g., a urea decomposition pipe) of a diesel exhaust aftertreatment system. The urea conversion catalyst includes a refractory metal oxide and a cationic dopant. The urea conversion catalyst can decrease the temperature at which urea converts to ammonia, can increase the urea conversion yield, and c…
- Who is the assignee on this patent?
- Goffe Randal A, Paccar Inc
- What technology area does this patent fall under?
- Primary CPC classification B01J23/83. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 26 2017 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).