W4 Gas and Liquid Fuel

Problem Solving
One hundred mol/h of butane (C4H16) and 5000 mol/h of air are fed into a combustion reactor. Calculate the percent excess air.


























Propane is burned with air. No carbon monoxide is present in the combustion products. Calculate the molar composition of the product gas for each of the following cases:

Theoretical air supplied, 100 % conversion of propane






















20 % excess air, 100 % conversion of propane


















20 % excess air, 90 % conversion of propane



























A high grade fuel oil containing approximately 91.0% C,and 9.0% H is burnt in a furnace that is well designed and well operated, giving a combustion gas, the Orsat analysis of which shows 12.4 % CO2, 3.7 % O2 and 83.9 % N2 and inerts. The air is substantially.















Specify the basis and the amount of the species available.







Calculate the theoretical mole of oxygen gas.





Calculate the mole of oxygen gas and nitrogen gas fed.












Write the balanced chemical equations.




Calculate the moles of the output stream.






Calculate the ratio of water to dry stack gas.






A fuel oil is analysed and found to contain 85 wt % carbon, 12.0 % elemental hydrogen (H), 1.7 % sulfur, and the remainder non-combustible matter. The oil is burned with 20 % excess air, based on complete combustion of the carbon to CO2, the hydrogen to H2O and the sulfur to SO2. The oil is burned completely but 8% of thye carbon forms cO. Calculate th molar composition of the stack gas.







Names: __________________________ CHE112P Worksheet :_________
Sec: _____ Combustion of Gas and Liquid Fuel