Chemistry, 08.03.2021 20:10 nikitakhrabkov123
A mixture of 75 mole% methane and 25 mole% hydrogen is burned with 25% excess air. Fractional conversions of 90% of the methane and 85% of the hydrogen are achieved; of the methane that reacts, 95% reacts to form CO2 and the balance reacts to form CO. The hot combustion product gas passes through a boiler in which heat transferred from the gas converts boiler feedwater into steam.
Required:
a. Calculate the concentration of CO (ppm) in the stack gas.
b. The CO in the stack gas is a pollutant. Its concentration can be decreased by increasing the percent excess air fed to the furnace. Think of at least two costs of doing so. (Hint: The heat released by the combustion goes into heating the combustion products; the higher the combustion product temperature, the more steam is produced.)
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A mixture of 75 mole% methane and 25 mole% hydrogen is burned with 25% excess air. Fractional conver...
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