Combustion Characteristics of Fuels With Preheated Oxygen Enriched Air

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Title Combustion Characteristics of Fuels With Preheated Oxygen Enriched Air
Creator Guerrero, Pablo S.; Rebello, Wilfred J.; Ally, Moonis R.; Jain, Ramesh
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1986
Spatial Coverage presented at Chicago, Illinois
Abstract Enriching air with oxygen in furnace combustion systems can significantly increase the thermal efficiency of the system and contribute to a savings in fuel and an increase in productivity. If economic feasibility is proven for a given application, the only other potential barrier to the use of oxygen enrichment in industrial combustion processes could be the increase in NOx formation due to the higher flame temperatures. The objectives of this work were to determine the maximum flame temperatures resulting from the combustion of various solid, liquid and gaseous fuels with preheated oxygen enriched air, to determine the maximum (equilibrium) levels of pollutant (NOx) concentrations and to predict actual levels of NOx that could be expected in typical industrial furnaces. The computer program considered thirteen dissociating species, preheat temperatures up to 2000F and oxygen enrichment levels varying from 21% to 50% oxygen. The results indicate that for natural gas above flame temperature of 5165°F, the equilibrium NO values tend to decrease with high levels of 3xygen and high preheat temperatures because other dissociating reactions predominate at these high temperatures. A methodology was developed, using kinetics, to predict the actual NO expected in a typical furnace. The predicted values of NO were compared with measured values for an experimental furnace and found to be in general agreement. Though there are no New Source Performance Standards for industrial furnaces, the analysis indicates that for combustion of nanrral gas with preheated oxygen enriched air, the NOx formed would be conSiderably more than the NSPS for an industrial steam generator of 0.2 lbs N02/million BTU.
Type Text
Format application/pdf
Language eng
Rights This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
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Scanning Technician Cliodhna Davis
Metadata Cataloger Kendra Yates
ARK ark:/87278/s6g163cn
Setname uu_afrc
Date Created 2012-04-20
Date Modified 2012-08-02
ID 3897
Reference URL