Chemical Engineering > GATE 2011 > Combustion
The following combustion reactions occur when methane is burnt.
CH4+2O2→CO2+2H2O
2CH4+3O2→2CO+4H2O
20% excess air is supplied to the combustor. The conversion of methane is 80% and the molar ratio of CO to CO2 in the flue gas is 1:3. Assume air to have 80 mol % N2 and rest O2. The O2 consumed as a PERCENTAGE of O2 entering the combustor is
A
20
B
62.5
C
80
D
83.3

Correct : b

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combustion reaction methane GATE Chemical Engineering 2011 methane combustion excess air combustion flue gas analysis CO to CO2 ratio air composition O2 consumed percentage chemical engineering gate combustion efficiency GATE 2011 Chemical Engineering

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