Char Combustion Kinetics of Kentucky No. 9 Coal as Applied to Atmospheric Fluidized Bed Combustion

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Title Char Combustion Kinetics of Kentucky No. 9 Coal as Applied to Atmospheric Fluidized Bed Combustion
Creator Daw, C. S.; Mitchell, R. E.; Byrd, J. R.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1985
Spatial Coverage presented at Livermore, California
Abstract Overall char burning rates were measured for Kentucky No. 9 coal and for char elutriated from the Tennessee Valley Authority 20 MW(e) Atmospheric Fluidized Pilot Plant while Kentucky No. 9 was being fed. Low-temperature burning rates (650 to 1100 K) were measured with a thermogravimetric analyzer at Oak Ridge National Laboratory, Oak Ridge, Tennessee. These data are compared with previous thermogravimetric data for Kentucky No. 9 and Ohio No. 6 coal and data from a fixed-sample, tubular-flow reactor at Oak Ridge. High temperature experiments (1390 to 1600 K) were conducted in the entrained-flow reactor at Sandia National Laboratory, Livermore, California. These data are compared with the low-temperature results. It is concluded that the burning rate of Kentucky No.9 char, exclusive of external mass-transfer effects, is best represented by two Arrhenius expressions, one applicable for low temperatures and another applicable for high temperatures. At temperatures typical of atmospheric fluidized bed combustion, the two expressions predict rates of similar magnitude. It is also concluded that the pilot plant elutriate is less reactive than Kentucky No. 9 coal at low temperatures. At high temperatures, the reactivity of the elutriate and coal appear to be nearly equal.
Type Text
Format application/pdf
Language eng
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Conversion Specifications Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician Cliodhna Davis
Metadata Cataloger Kendra Yates
ARK ark:/87278/s6gf0x1z
Setname uu_afrc
Date Created 2012-04-11
Date Modified 2012-08-07
ID 2109
Reference URL