DE69719957D1 - Schwefelbeständige NOx-Falle enthaltend Wolframphorsphorsäure und Edelmetalle - Google Patents
Schwefelbeständige NOx-Falle enthaltend Wolframphorsphorsäure und EdelmetalleInfo
- Publication number
- DE69719957D1 DE69719957D1 DE69719957T DE69719957T DE69719957D1 DE 69719957 D1 DE69719957 D1 DE 69719957D1 DE 69719957 T DE69719957 T DE 69719957T DE 69719957 T DE69719957 T DE 69719957T DE 69719957 D1 DE69719957 D1 DE 69719957D1
- Authority
- DE
- Germany
- Prior art keywords
- sulfur
- phosphoric acid
- precious metals
- containing tungsten
- nox trap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9422—Processes characterised by a specific catalyst for removing nitrogen oxides by NOx storage or reduction by cyclic switching between lean and rich exhaust gases (LNT, NSC, NSR)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1023—Palladium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1025—Rhodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/204—Alkaline earth metals
- B01D2255/2042—Barium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20776—Tungsten
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/814,523 US5922295A (en) | 1997-03-10 | 1997-03-10 | Sulfur-resistant NOx traps containing tungstophosphoric acid and precious metal |
US814523 | 1997-03-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69719957D1 true DE69719957D1 (de) | 2003-04-24 |
DE69719957T2 DE69719957T2 (de) | 2004-01-22 |
Family
ID=25215302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69719957T Expired - Fee Related DE69719957T2 (de) | 1997-03-10 | 1997-12-31 | Schwefelbeständige NOx-Falle enthaltend Wolframphorsphorsäure und Edelmetalle |
Country Status (4)
Country | Link |
---|---|
US (1) | US5922295A (de) |
EP (1) | EP0864353B1 (de) |
JP (1) | JP3844586B2 (de) |
DE (1) | DE69719957T2 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2257949C (en) * | 1996-06-10 | 2003-02-11 | Hitachi, Ltd. | Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine |
US6210649B1 (en) * | 1997-04-15 | 2001-04-03 | Massachusetts Institute Of Technology | Metal oxide catalysts for nitric oxide reduction |
CA2288105C (en) * | 1997-04-23 | 2002-08-06 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification method and exhaust gas purification catalyst |
US6182443B1 (en) * | 1999-02-09 | 2001-02-06 | Ford Global Technologies, Inc. | Method for converting exhaust gases from a diesel engine using nitrogen oxide absorbent |
JP2001232195A (ja) * | 1999-12-17 | 2001-08-28 | Ngk Insulators Ltd | 触媒体 |
US20020082164A1 (en) * | 2000-01-14 | 2002-06-27 | Danan Dou | Methods to reduce alkali material migration from NOx adsorber washcoat to cordierite |
FI118326B (fi) | 2000-04-10 | 2007-10-15 | Ecocat Oy | Adsorbenttikatalyytti |
US6537511B1 (en) * | 2000-08-21 | 2003-03-25 | Ford Global Technologies, Inc. | Modified platinum NOx trap for automotive emission reduction |
US7199088B2 (en) | 2002-07-01 | 2007-04-03 | Shell Oil Company | Lubricating oil for a diesel powered engine and method of operating a diesel powered engine |
JP5157068B2 (ja) * | 2006-01-10 | 2013-03-06 | トヨタ自動車株式会社 | 硫化水素生成抑制材及び排ガス浄化用触媒 |
EP2269732B1 (de) * | 2008-03-25 | 2020-07-01 | Mitsubishi Hitachi Power Systems, Ltd. | Ein verfahren zur reinigung von abgas |
GB201517580D0 (en) * | 2015-10-06 | 2015-11-18 | Johnson Matthey Plc | Exhaust system comprising a passive nox adsorber |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS553872A (en) * | 1978-06-27 | 1980-01-11 | Mitsubishi Heavy Ind Ltd | Preparing denitrification catalyst |
US4389382A (en) * | 1981-07-20 | 1983-06-21 | Ford Motor Company | Method of using a simplified low cost catalyst system |
CA1291983C (en) * | 1986-09-29 | 1991-11-12 | Keisuke Kinomura | Glycosidation catalyst and process for preparing glycoside derivatives |
EP0605995B1 (de) * | 1993-01-08 | 1998-09-16 | Ford Motor Company Limited | Zweistufiges katalysator System für einem Verbrennungsmotor |
EP0613714B1 (de) * | 1993-01-11 | 2001-07-04 | Toyota Jidosha Kabushiki Kaisha | Verfahren zur Reinigung von Abgasen |
US5391532A (en) * | 1993-05-06 | 1995-02-21 | Exxon Research And Engineering Company | Zirconium hydroxide supported metal and heteropolyacid catalysts |
-
1997
- 1997-03-10 US US08/814,523 patent/US5922295A/en not_active Expired - Fee Related
- 1997-12-31 EP EP97310684A patent/EP0864353B1/de not_active Expired - Lifetime
- 1997-12-31 DE DE69719957T patent/DE69719957T2/de not_active Expired - Fee Related
-
1998
- 1998-02-02 JP JP02128298A patent/JP3844586B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69719957T2 (de) | 2004-01-22 |
JPH10249168A (ja) | 1998-09-22 |
EP0864353A1 (de) | 1998-09-16 |
EP0864353B1 (de) | 2003-03-19 |
JP3844586B2 (ja) | 2006-11-15 |
US5922295A (en) | 1999-07-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: THE REGENTS OF THE UNIVERSITY OF MICHIGAN TECHNOLO |
|
8328 | Change in the person/name/address of the agent |
Representative=s name: NEIDL-STIPPLER UND KOLLEGEN, 81679 MUENCHEN |
|
8328 | Change in the person/name/address of the agent |
Representative=s name: DREISS, FUHLENDORF, STEIMLE & BECKER, 70188 STUTTG |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |