A gas consisting only of CO and N2 is made by passing a mixture of flue gas and air through a bed of incandescent coke (assume pure carbon). The two reactions that occur both go to completion:
The flue gas composition is 12.8 mol-% CO, 3.7 mol-% CO2, 5.4 mol-% O2, and 78.1 mol-% N2. The flue gas/air mixture is so proportioned that the heals of the two reactions cancel, and the temperature of the coke bed is therefore constant. If this temperature is 875 °C. if the feed stream is preheated to 875°C. and if the process is adiabatic, what ratio of moles of flue gas to moles of air is required, and what is the composition of the gas produced?
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