The stack gas produced upon combustion of the coal analyzes 11.2% CO, 0.7% CO and 8.3% O at 900F. The air supplied in the boiler

• The stack gas produced upon combustion of the coal analyzes 11.2% CO₂, 0.7% CO and 8.3% O₂ at 900°F. The air supplied in the boiler is saturated with water vapor and enters at 73°F. A pressure of 750 mmHg. 
• a. Find the ratio of net H to carbon in the coal and the ultimate analysis of the coal. With the Initial data of the coal contains 70.1% carbon, 6.9% moisture and 8% ash. Neglect nitrogen and sulfur content. 
• b. Find the excess air supplied in the boiler? How much air is needed in ft³/lb of coal? 
• c. How many ft³ of stack gas (SG) is produced if the boiler makes use of 50 tons of coal? Calculation Basis as 100 lbmols of dry stack gas (SG).
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