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Title: Method for control of NOx emission from combustors using fuel dilution

Abstract

A method of controlling NOx emission from combustors. The method involves the controlled addition of a diluent such as nitrogen or water vapor, to a base fuel to reduce the flame temperature, thereby reducing NOx production. At the same time, a gas capable of enhancing flame stability and improving low temperature combustion characteristics, such as hydrogen, is added to the fuel mixture. The base fuel can be natural gas for use in industrial and power generation gas turbines and other burners. However, the method described herein is equally applicable to other common fuels such as coal gas, biomass-derived fuels and other common hydrocarbon fuels. The unique combustion characteristics associated with the use of hydrogen, particularly faster flame speed, higher reaction rates, and increased resistance to fluid-mechanical strain, alter the burner combustion characteristics sufficiently to allow operation at the desired lower temperature conditions resulting from diluent addition, without the onset of unstable combustion that can arise at lower combustor operating temperatures.

Inventors:
 [1];  [2]
  1. Alamo, CA
  2. Oakland, CA
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
902977
Patent Number(s):
7,162,864
Application Number:
10/701,763
Assignee:
Sandia National Laboratories (Livermore, CA)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Schefer, Robert W, and Keller, Jay O. Method for control of NOx emission from combustors using fuel dilution. United States: N. p., 2007. Web.
Schefer, Robert W, & Keller, Jay O. Method for control of NOx emission from combustors using fuel dilution. United States.
Schefer, Robert W, and Keller, Jay O. Tue . "Method for control of NOx emission from combustors using fuel dilution". United States. https://www.osti.gov/servlets/purl/902977.
@article{osti_902977,
title = {Method for control of NOx emission from combustors using fuel dilution},
author = {Schefer, Robert W and Keller, Jay O},
abstractNote = {A method of controlling NOx emission from combustors. The method involves the controlled addition of a diluent such as nitrogen or water vapor, to a base fuel to reduce the flame temperature, thereby reducing NOx production. At the same time, a gas capable of enhancing flame stability and improving low temperature combustion characteristics, such as hydrogen, is added to the fuel mixture. The base fuel can be natural gas for use in industrial and power generation gas turbines and other burners. However, the method described herein is equally applicable to other common fuels such as coal gas, biomass-derived fuels and other common hydrocarbon fuels. The unique combustion characteristics associated with the use of hydrogen, particularly faster flame speed, higher reaction rates, and increased resistance to fluid-mechanical strain, alter the burner combustion characteristics sufficiently to allow operation at the desired lower temperature conditions resulting from diluent addition, without the onset of unstable combustion that can arise at lower combustor operating temperatures.},
doi = {},
url = {https://www.osti.gov/biblio/902977}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {1}
}

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