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Title: NOx reduction methods and apparatuses

Abstract

A NO.sub.x reduction method includes treating a first gas containing NO.sub.x, producing a second gas containing NO.sub.2, reducing a portion of the NO.sub.2 in the second gas to N.sub.2, and producing a third gas containing less NO.sub.x than the first gas, substantially all of the third gas NO.sub.x being NO. The method also includes treating the third gas, producing a fourth gas containing NO.sub.2, reducing a portion of the NO.sub.2 in the fourth gas to N.sub.2, and producing a fifth gas containing less NO.sub.x than the third gas, substantially all of the fifth gas NO.sub.x being NO. Treating the first and/or third gas can include treatment with a plasma. Reducing a portion of the NO.sub.2 in the second and/or fourth gas can include reducing with a catalyst. The method can further include controlling energy consumption of the plasmas independent of each other.

Inventors:
; ; ;
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175094
Patent Number(s):
6808694
Application Number:
09/960,124
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Tonkyn, Russell G., Barlow, Stephan E., Balmer, M. Lou, and Maupin, Gary D. NOx reduction methods and apparatuses. United States: N. p., 2004. Web.
Tonkyn, Russell G., Barlow, Stephan E., Balmer, M. Lou, & Maupin, Gary D. NOx reduction methods and apparatuses. United States.
Tonkyn, Russell G., Barlow, Stephan E., Balmer, M. Lou, and Maupin, Gary D. Tue . "NOx reduction methods and apparatuses". United States. https://www.osti.gov/servlets/purl/1175094.
@article{osti_1175094,
title = {NOx reduction methods and apparatuses},
author = {Tonkyn, Russell G. and Barlow, Stephan E. and Balmer, M. Lou and Maupin, Gary D.},
abstractNote = {A NO.sub.x reduction method includes treating a first gas containing NO.sub.x, producing a second gas containing NO.sub.2, reducing a portion of the NO.sub.2 in the second gas to N.sub.2, and producing a third gas containing less NO.sub.x than the first gas, substantially all of the third gas NO.sub.x being NO. The method also includes treating the third gas, producing a fourth gas containing NO.sub.2, reducing a portion of the NO.sub.2 in the fourth gas to N.sub.2, and producing a fifth gas containing less NO.sub.x than the third gas, substantially all of the fifth gas NO.sub.x being NO. Treating the first and/or third gas can include treatment with a plasma. Reducing a portion of the NO.sub.2 in the second and/or fourth gas can include reducing with a catalyst. The method can further include controlling energy consumption of the plasmas independent of each other.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {10}
}

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Works referenced in this record:

Lean NOx Reduction in Two Stages: Non-thermal Plasma Followed by Heterogeneous Catalysis
conference, October 2000


NOx Destruction Behavior of Select Materials When Combined with a Non-Thermal Plasma
conference, October 1999