Methane is at the rate 50 moles is supplied to a reactor with air at the rate 1000 moles, the reactor leaves O2, N2, CO2 and H2O, what is the percentage of CO2 in products?(a) 4.7%(b) 10.4%(c) 16.5%(d) 24.3%I had been asked this question in a national level competition.My query is from Material Balances Involving Combustion in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Methane is at the rate 50 moles is supplied to a reactor with air at t

1.	Methane is at the rate 50 moles is supplied to a reactor with air at the rate 1000 moles, the reactor leaves O2, N2, CO2 and H2O, what is the percentage of CO2 in products?(a) 4.7%(b) 10.4%(c) 16.5%(d) 24.3%I had been asked this question in a national level competition.My query is from Material Balances Involving Combustion in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering
Answer» Right choice is (a) 4.7% The explanation is: The reaction is CH4 + 2O2 -> CO2 + 2H2O. O2 supplied = 100021/100 = 210 MOLES, N2 supplied = 100079/100 = 790 moles, => O2 unreacted = 210 – 100 = 110 moles, CO2 formed = 50 moles, H2O formed = 100 moles. => Percentage of CO2 = 50/1050*100 = 4.7%.

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