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A high-grade semi-anthracite coal was found to contain 90.04% C, 0.79% S, and 1.2% N on an ash and moisture-free basis. If this coal were burned in excess air saturated with water at 30°C and 105 kPa, a flue gas with the following Orsat analysis results: 10.83% CO₂, 1.08% CO, 0.22% H₂, 8.67 % O₂, and 79.2% N₂. Calculate the ultimate analysis of coal (ash/moisture free) and the % excess air.
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A high-grade semi-anthracite coal was found to contain 90.04% C, 0.79% S, and 1.2% N on an ash and m...
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