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Title: Nox reduction system utilizing pulsed hydrocarbon injection

Abstract

Hydrocarbon co-reductants, such as diesel fuel, are added by pulsed injection to internal combustion engine exhaust to reduce exhaust NO.sub.x to N.sub.2 in the presence of a catalyst. Exhaust NO.sub.x reduction of at least 50% in the emissions is achieved with the addition of less than 5% fuel as a source of the hydrocarbon co-reductants. By means of pulsing the hydrocarbon flow, the amount of pulsed hydrocarbon vapor (itself a pollutant) can be minimized relative to the amount of NO.sub.x species removed.

Inventors:
 [1];  [2];  [3];  [1]
+ Show Inventor Affiliations
  1. Livermore, CA
  2. San Ramon, CA
  3. Fremont, CA
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
OSTI Identifier:
873610
Patent Number(s):
6202407
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
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DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nox; reduction; utilizing; pulsed; hydrocarbon; injection; co-reductants; diesel; fuel; added; internal; combustion; engine; exhaust; reduce; presence; catalyst; 50; emissions; achieved; addition; source; means; pulsing; flow; amount; vapor; pollutant; minimized; relative; species; removed; internal combustion; combustion engine; diesel fuel; engine exhaust; pulsed injection; reduce exhaust; utilizing pulsed; hydrocarbon vapor; carbon vapor; /60/180/

Citation Formats

Brusasco, Raymond M, Penetrante, Bernardino M, Vogtlin, George E, and Merritt, Bernard T. Nox reduction system utilizing pulsed hydrocarbon injection. United States: N. p., 2001. Web.
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Brusasco, Raymond M, Penetrante, Bernardino M, Vogtlin, George E, & Merritt, Bernard T. Nox reduction system utilizing pulsed hydrocarbon injection. United States.
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Brusasco, Raymond M, Penetrante, Bernardino M, Vogtlin, George E, and Merritt, Bernard T. Mon . "Nox reduction system utilizing pulsed hydrocarbon injection". United States. https://www.osti.gov/servlets/purl/873610.
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@article{osti_873610,
title = {Nox reduction system utilizing pulsed hydrocarbon injection},
author = {Brusasco, Raymond M and Penetrante, Bernardino M and Vogtlin, George E and Merritt, Bernard T},
abstractNote = {Hydrocarbon co-reductants, such as diesel fuel, are added by pulsed injection to internal combustion engine exhaust to reduce exhaust NO.sub.x to N.sub.2 in the presence of a catalyst. Exhaust NO.sub.x reduction of at least 50% in the emissions is achieved with the addition of less than 5% fuel as a source of the hydrocarbon co-reductants. By means of pulsing the hydrocarbon flow, the amount of pulsed hydrocarbon vapor (itself a pollutant) can be minimized relative to the amount of NO.sub.x species removed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}
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Works referenced in this record:

The Effect of Hydrocarbon Composition on Lean NOx Catalysis
conference, October 1997

  • Collier, Anthony R.; Wedekind, Barbara
  • International Fuels & Lubricants Meeting & Exposition, SAE Technical Paper Series
  • https://doi.org/10.4271/973000
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