Exhaust gas aftertreatment systems

Details Exhaust gas aftertreatment systems Exhaust gas aftertreatment systems

2005-05-17

2005-05-17

Nguyen, Tu M. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S276000, C060S277000, C060S286000, C060S295000, C060S297000, C060S301000

Reexamination Certificate

active

06892530

ABSTRACT:
A method for improving NOx conversion efficiency of a urea base SCR catalyst is presented. Since efficiency is reduced by the presence of hydrocarbons in the catalyst, the method proposes to regenerate the SCR by maintaining its temperature above the boiling point of hydrocarbons for a sufficient period of time to free up catalyst storage sites. The regeneration process is followed by over-injection of ammonia to replenish the ammonia released from the SCR catalyst due to high regeneration temperatures.

REFERENCES:
patent: 5628186 (1997-05-01), Schmelz
patent: 5643536 (1997-07-01), Schmelz
patent: 5665318 (1997-09-01), Rembold et al.
patent: 5771689 (1998-06-01), Bareis et al.
patent: 5809775 (1998-09-01), Tarabulski et al.
patent: 5893267 (1999-04-01), Vogtlin et al.
patent: 5924280 (1999-07-01), Tarabulski
patent: 6003305 (1999-12-01), Martin et al.
patent: 6038854 (2000-03-01), Penetrante et al.
patent: 6066303 (2000-05-01), Sudduth et al.
patent: 6109024 (2000-08-01), Kinugasa et al.
patent: 6119452 (2000-09-01), Kinugasa et al.
patent: 6125629 (2000-10-01), Patchett
patent: 6171566 (2001-01-01), Ku et al.
patent: 6182443 (2001-02-01), Jarvis et al.
patent: 6192675 (2001-02-01), Hirota et al.
patent: 6209315 (2001-04-01), Weigl
patent: 6221324 (2001-04-01), Coq et al.
patent: 6266955 (2001-07-01), Liang et al.
patent: 6269633 (2001-08-01), Van Nieuwstadt et al.
patent: 6294141 (2001-09-01), Twigg et al.
patent: 6299847 (2001-10-01), Allen
patent: 6305160 (2001-10-01), Hammerle et al.
patent: 6311480 (2001-11-01), Suzuki et al.
patent: 6314722 (2001-11-01), Matros et al.
patent: 6383463 (2002-05-01), Mochida et al.
patent: 20020104312 (2002-08-01), Hoffman et al.
patent: WO 9939809 (1999-08-01), None
IMECE-2002-DSC-32104, “Modeling of a Urea SCR Catalyst with Automotive Applications”, Devesh Upadhyay, Michiel Van Nieuwstadt, pp. 1-7, Proceedings of ASME:IMECE, Nov. 17, 2002, New Orleans.
IMECE-2002-DSC-32103, “Control Design of an Automotive Urea SCR Catalyst”, Devesh Upadhyay, Michiel Van Nieuwstadt, pp. 1-8, Proceedings of ASME:IMECE, Nov. 17, 2002, New Orleans.

Affiliated with

Also associated with

Rating

Exhaust gas aftertreatment systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust gas aftertreatment systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas aftertreatment systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3457359