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Show 2.1 Proximate and Ultimate Analyses of the Fuels Table 1 presents typical proximate and ultimate analyses of the coals, green sawdust, TDF, and representative blends of the fuels burned. Note that the wood is particularly volatile, and increases the volatile/fixed carbon ratio of the fuel blend. The IDF, while more volatile than the coal, makes less of an impact on total fuel volatility than the sawdust. The wood waste also reduces the nitrogen and sulfur contents of the fuel blend, measured in lb N/I06 Btu and lb S/106 Btu. The TDF has the potential to achieve a reduction in fuel nitrogen, but its influence on fuel sulfur content is a function of the coal displaced. TDF has a beneficial impact on fuel sulfur when blended with interior province coal, however it can increase the sulfur content when blended with western coals. The sawdust increases the fuel ash content, in Ib/1 06 Btu, while the TDF decreases the fuel ash content both on an absolute percentage and Ib/1 06 Btu basis. Not shown in the table are blends of interior province coal with wood, or with wood and TDF. Note from the base data, however, that the influence of the alternate fuels on the nitrogen and sulfur content of the fuel blend will be more pronounced with the high sulfur IllinoislW estern Kentucky type coals. Similarly the influence on fuel volatility and ash content will be more significant with the eastern coals than the western coals. The practical blend limit in fuel nitrogen is 20 percent alternative fuel when cofiring with western coals; and this limit is somewhat higher when the alternate fuels are blended with eastern coal. ... I~~.~.~ .. ~.~ .... !!~P.~~~~~.~.~.!~.Y.~ .. ~.~~!~~!~.~!~!.~~~ .. ~f.¥..~~~~ .. ~.~!~~~ .. P.~!!.~g .. !~~ .. ~!~.~~ .. ¥.~~.~~.~ .. r..~~.~~ .. I~.~~~ .............. Parameter Interior Western Wood IDF 15% Wood, 5% 20% Wood with Province Coal (green IDF Blend with Western Coal Coal sawdust) Western Coal Proximate Analysis Moisture 8.79 9.60 40.84 2.95 13.97 15.85 Ash 8.26 7.33 3.70 4.79 6.66 6.60 Volatile Matter 33 .22 39.06 46.36 60.82 41.19 40.52 Fixed Carbon 49.73 44.01 9.10 31.44 38.18 37.03 Ultimate Analysis Carbon 68.6 66.91 28.50 81.63 61.85 59.23 Hydrogen 4.64 4.86 3.32 7.03 4.73 4.55 Oxygen 6.23 9.58 23 .52 1.06 11.27 12.37 Nitrogen 1.23 1.15 0.08 0.54 0.96 0.93 Sulfur 2.24 0.58 0.05 2.02 0.57 0.47 Chlorine 0.24 <0.01 <0.01 0.05 Moisture 8.79 9.60 340.84 2.95 13.97 15.85 Ash 8.26 7.33 3.70 4.79 6.66 6.60 Higher Heating Value 12,305 12,029 4,739 15,332 11 ,093 10,571 (BtuIlb) VolatilelFixed Carbon Ratio 0.67 0.89 5.09 1.93 1.08 1.09 lb N/l06 Btu 1.00 0.96 0.17 0.35 0.87 0.88 lb S/I06 Btu 1.82 0.48 0.11 1.32 0.51 0.44 lb Ash/l06 Btu 6.71 6.09 7.81 3.12 6.00 6.24 5 |