Oxy-coal combustion: effects of PO2 on coal jet stability in 02/C02 environnments

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Title Oxy-coal combustion: effects of PO2 on coal jet stability in 02/C02 environnments
Creator Zhang, Jingwei; Kelly, Kerry; Eddings, Eric G.; Wendt, Jost O. L.
Publication type report
Publisher American Flame Research Committee (AFRC)
Date 2009
Description The purpose of this research is to understand and predict the effects of near burner zone environment on ignition characteristics of a turbulent axial pulverized coal jet. In oxy-coal combustion this environment consists of O2 and CO2 (instead of N2). Ultimately the experiment will provide data for simulation validation studies that can be used to predict how air fired combustors may be retrofitted to oxy-coal. Specifically the objective is to explore effects of variations in the partial pressure of O2 and CO2 on coal jet ignition and flame stability. During the oxy coal jet ignition process, the partial pressure of oxygen, PO2, in the transporting fluid, comprises one additional degree of freedom in controlling flame aerodynamics, and enhancing coal ignition, flame attachment/detachment and modifying pollutant formation. The experimental investigations are carried on in a 100 kW laboratory furnace outfitted with an axial burner and arrays of electrical-heated panels in the burner zone in order to control variations in near-burner heat loss. The furnace also has visual access through quartz windows to. Sufficient supply of O2 and fresh CO2 are supplied through special utility infrastructure in the laboratory. A special CMOS sensor based camera is used to capture Type 0 axial turbulent diffusion flame shape for the use of statistical studies of flame length at different operational parameters, with special emphasis on systematic variations of partial oxygen pressure in both transport and secondary oxidant streams. Our experimental data show how flame attachment increased with PO2 in either primary or secondary oxidant streams. These variables were also shown to have a firstorder influence on Fuel NOx. Future work will use these data to validate CFD simulations of axial coal jet ignition in turbulent flows.
Type Text
Format application/pdf
Language eng
OCR Text Show
Metadata Cataloger CLR;AM
ARK ark:/87278/s6np76k2
Relation has part Zhang, J., Kelly, K., Eddings, E. G., & Wendt, J. O. L. (2009). Oxy-coal combustion: effects of PO2 on coal jet stability in 02/C02 environnments. American Flame Research Committee (AFRC).
Format medium application/pdf
Rights management (c)American Flame Research Committee
Setname uu_afrc
Date Created 2020-02-18
Date Modified 2020-02-18
ID 1527055
Reference URL https://collections.lib.utah.edu/ark:/87278/s6np76k2