http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102013207922-B4
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_63c90ac1a899bf69958e2a7dfa34c12f |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-2065 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-2073 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-1021 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-91 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-104 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2255-1023 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02C20-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02A50-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F01N3-103 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F01N3-0842 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-9413 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-9481 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F01N3-20 |
| filingDate | 2013-04-30^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-04-22^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e33243218f404f23e52b2997a1fd4390 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_faafe151a371e89c0af336fce5042c76 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9dbc1670d0210ccc9b02dd63cd88ec33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd240d2a0916ea2ad0aca0b068725477 |
| publicationDate | 2021-04-22^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-102013207922-B4 |
| titleOfInvention | Method for treating an exhaust gas flow with a silver-backed, closely coupled NOx absorber |
| abstract | A method of treating the exhaust gas stream flowing from a vehicle internal combustion engine during a period of time after the engine has been cold started, the exhaust gas stream comprising a mixture of nitrogen monoxide, carbon monoxide, hydrocarbons, hydrogen, water, carbon dioxide, oxygen and nitrogen, the exhaust gas having an initial temperature is below 75 ° C and heats up progressively during continued engine operation, the method comprising: continuously passing the hydrogen-containing and nitrogen monoxide-containing exhaust gas stream into contact with a silver / aluminum oxide material which comprises particles of silver or a silver oxide supported on particles of aluminum oxide, the silver content in the weight range from 0.5% to 10% of the total weight of the particles of silver or silver oxide and aluminum oxide, the silver / aluminum oxide material being deposited on a substrate which receives the flow of the exhaust gas stream in contact with the silver / aluminum oxide material to convert at least a portion of the nitric oxide to nitrogen dioxide oxidize, and temporarily absorb some of the nitrogen oxide and nitrogen dioxide product on the silver / alumina material, the exhaust gas stream next flowing in contact with a different absorber material selected to act as a NOx absorber during the period after the engine cold start serve, wherein the silver / aluminum oxide material is arranged so that the exhaust gas flow leaves an exhaust manifold of the engine in a defined exhaust gas flow path and flows into contact with the silver / aluminum oxide material after it flows a distance of no more than 50 centimeters along the Flow path has passed after exiting the exhaust manifold; then continuously and then Passing the exhaust gas stream through at least one downstream reactor to further oxidize or reduce constituents of the exhaust gas as the temperature of the exhaust gas increases and heats each downstream reactor to an oxidizing or reducing operating temperature, and Continuing to pass the exhaust gas into contact with the silver / alumina material, the different absorber material, and through each reactor for the duration of the engine operation, the silver / alumina material releasing its absorbed nitrogen oxides and ceasing to oxidize NO in the exhaust stream when it is heated by the exhaust gas stream above its absorption temperature range for the nitrogen oxides; wherein the silver / aluminum oxide material resumes its NO oxidation function and its nitrogen dioxide absorption after an engine cool-down period and a subsequent engine cold start. |
| priorityDate | 2012-05-07^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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