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Class Information
Number: 423/213.7
Name: Chemistry of inorganic compounds > Modifying or removing component of normally gaseous mixture > Mixture is exhaust from internal-combustion engine > Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element > Including successive stage treatments to modify or remove a different component in each stage
Description: Processes in which there are at least two serial treatments of the gaseous mixture, each treatment modifying or removing a component different than that affected by the other.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7622096 |
Multilayered catalyst compositions |
Nov. 24, 2009 |
| 7618605 |
Exhaust emission control device and method for internal combustion engine, and engine control unit |
Nov. 17, 2009 |
| 7608230 |
Sample conditioning system for removing selenium from a gas stream |
Oct. 27, 2009 |
| 7597865 |
Nitrogen oxide removal catalyst system and nitrogen oxide removal method |
Oct. 6, 2009 |
| 7591986 |
Exhaust emission control device and method for internal combustion engine, and engine control unit |
Sep. 22, 2009 |
| 7569197 |
Process for purification of sulphur-containing exhaust gas |
Aug. 4, 2009 |
| 7563422 |
Method for reducing a particle and nitrogen oxide proportion in an exhaust gas flow of an internal combustion engine and corresponding exhaust gas treatment unit |
Jul. 21, 2009 |
| 7541010 |
Silver doped catalysts for treatment of exhaust |
Jun. 2, 2009 |
| 7521031 |
Method and apparatus for treating exhaust gas |
Apr. 21, 2009 |
| 7521033 |
Exhaust inlet metallic foam trap coupled to a downstream monolithic precious metal catalyst |
Apr. 21, 2009 |
| 7494634 |
Reduction of nitrogen oxides using multiple split streams |
Feb. 24, 2009 |
| 7491373 |
Flow-through honeycomb substrate and exhaust after treatment system and method |
Feb. 17, 2009 |
| 7488462 |
Multi-stage catalyst systems and uses thereof |
Feb. 10, 2009 |
| 7485271 |
Catalyst structure for treating NO.sub.x containing exhaust gas from a lean burn engine |
Feb. 3, 2009 |
| 7485273 |
Method for the reduction of NO.sub.x and NH.sub.3 emissions |
Feb. 3, 2009 |
| 7485272 |
Multi-stage system for selective catalytic reduction |
Feb. 3, 2009 |
| 7445761 |
Method and system for providing compressed substantially oxygen-free exhaust gas for industrial purposes |
Nov. 4, 2008 |
| 7442354 |
Treatment of engine exhaust using molecular sieve SSZ-56 |
Oct. 28, 2008 |
| 7431749 |
Catalytic filter for removing soot particulates from diesel engine exhaust and method of preparing the same |
Oct. 7, 2008 |
| 7413720 |
Catalyst and method for reduction of nitrogen oxides |
Aug. 19, 2008 |
| 7402292 |
Device and methods of ammonia generation for NOx abatement |
Jul. 22, 2008 |
| 7396517 |
Reduction of NOx emissions using a staged silver/alumina catalyst system |
Jul. 8, 2008 |
| 7390469 |
Bimodal catalyst-urea SCR system for enhanced NO.sub.x conversion and durability |
Jun. 24, 2008 |
| 7361320 |
Exhaust gas purification unit with reducing agent supply |
Apr. 22, 2008 |
| 7264785 |
Selective catalytic reduction |
Sep. 4, 2007 |
| 7210288 |
Exhaust gas aftertreatment installation and method |
May. 1, 2007 |
| 7081231 |
Method and system for the combination of non-thermal plasma and metal/metal oxide doped .gamma.-alumina catalysts for diesel engine exhaust aftertreatment system |
Jul. 25, 2006 |
| 7078004 |
Diesel oxidation catalyst |
Jul. 18, 2006 |
| 6968681 |
Method and device for aftertreatment of exhaust gases from combustion engines |
Nov. 29, 2005 |
| 6959542 |
Apparatus and method for operating a fuel reformer to regenerate a DPNR device |
Nov. 1, 2005 |
| 6893997 |
Exhaust gas purifying catalyst and method for purifying exhaust gas |
May. 17, 2005 |
| 6887443 |
Exhaust gas purifying catalyst and method for purifying exhaust gas |
May. 3, 2005 |
| 6863874 |
Process and apparatus for treating combustion exhaust gas |
Mar. 8, 2005 |
| 6843971 |
Process and catalyst for reducing nitrogen oxides |
Jan. 18, 2005 |
| 6823666 |
PROCESS FOR HEATING A SOOT FILTER IN AN EXHAUST GAS SYSTEM OF AN INTERNAL COMBUSTION ENGINE, PARTICULARLY A DIESEL ENGINE, WITH AT LEAST ONE CATALYTIC CONVERTER AND A SOOT FILTER MOUNTED DOWNS |
Nov. 30, 2004 |
| 6808694 |
NOx reduction methods and apparatuses |
Oct. 26, 2004 |
| 6696031 |
Treatment of exhaust gas |
Feb. 24, 2004 |
| 6685897 |
Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures |
Feb. 3, 2004 |
| 6680037 |
Device and method for removing sooty particulate from exhaust gases from combustion processes |
Jan. 20, 2004 |
| 6641788 |
Absorbent for a hydrocarbon, and exhaust gas-purifying catalyst |
Nov. 4, 2003 |
| 6551561 |
Apparatus for decoupled thermo-photocatalytic pollution control |
Apr. 22, 2003 |
| 6548032 |
Process for the treatment of gases with high oxygen content, with a view to controlling nitrogen oxide emissions, using a catalytic composition comprising cerium oxide and/or zirconium oxide |
Apr. 15, 2003 |
| 6497851 |
Engine exhaust treatment apparatus and method of use |
Dec. 24, 2002 |
| 6482377 |
Method for bypassing sulfur dioxide around an aftertreatment device in an exhaust gas aftertreatment system |
Nov. 19, 2002 |
| 6471924 |
Method and apparatus for NOx abatement in lean gaseous streams |
Oct. 29, 2002 |
| 6375910 |
Multi-zoned catalytic trap and methods of making and using the same |
Apr. 23, 2002 |
| 6365118 |
Reduction of NOx in the exhaust from leanOx internal combustion engines |
Apr. 2, 2002 |
| 6342128 |
Method and apparatus for decoupled thermo-photocatalytic pollution control |
Jan. 29, 2002 |
| 6334936 |
Method for decoupled thermo-catalytic pollution control |
Jan. 1, 2002 |
| 6319484 |
Compositions for abatement of volatile organic compounds and apparatus and methods using the same |
Nov. 20, 2001 |
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