A flare is used to convert unburnt gases into innocuous products such as CO2 and H2O. Knowing that a gas composed of 70% CH4, 5% C3H8, 15% CO, 5% O2 and 5% N2, in molar percentage, was burned in the flare with the chimney gas being 7.73% CO2, 12.35% H2O and the rest in O2 and N2, what was the percentage of excess air used?Extracted text: co, 0.0773 H0 0.1235 CH. 0.70 CH, + 20, - Co, + 2 H,0 C,H 0.05 Fuel Flue gas Flare CO 0.15 F mol C,H, + 50, → Co, + 4 H,O P mol 0.05 Air JA mol Co + ½ 0, - Co, N2 0.05 1.00 mol frs 02 0.21 N. 0.79 1.00 1.00

co, 0.0773 H0 0.1235 CH. 0.70 CH, + 20, - Co, + 2 H,0 C,H 0.05 Fuel Flue gas Flare CO 0.15 F mol C,H, + 50, → Co, + 4 H,O P mol 0.05 Air JA mol Co + ½ 0, - Co, N2 0.05 1.00 mol frs 02 0.21 N. 0.79...

A flare is used to convert unburnt gases into innocuous products such as CO₂
and H₂O. Knowing that a gas composed of 70% CH₄, 5% C₃H₈, 15% CO, 5% O₂
and 5% N₂, in molar percentage, was burned in the flare with the chimney gas being 7.73% CO₂, 12.35% H₂O and the rest in O₂
and N₂, what was the percentage of excess air used?

co, 0.0773<br>H0 0.1235<br>CH.<br>0.70<br>CH, + 20, - Co, + 2 H,0<br>C,H 0.05<br>Fuel<br>Flue gas<br>Flare<br>CO<br>0.15<br>F mol<br>C,H, + 50, → Co, + 4 H,O<br>P mol<br>0.05<br>Air JA mol<br>Co + ½ 0, - Co,<br>N2<br>0.05<br>1.00<br>mol frs<br>02 0.21<br>N. 0.79<br>1.00<br>1.00<br>

Extracted text: co, 0.0773 H0 0.1235 CH. 0.70 CH, + 20, - Co, + 2 H,0 C,H 0.05 Fuel Flue gas Flare CO 0.15 F mol C,H, + 50, → Co, + 4 H,O P mol 0.05 Air JA mol Co + ½ 0, - Co, N2 0.05 1.00 mol frs 02 0.21 N. 0.79 1.00 1.00

Jun 10, 2022

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co, 0.0773 H0 0.1235 CH. 0.70 CH, + 20, - Co, + 2 H,0 C,H 0.05 Fuel Flue gas Flare CO 0.15 F mol C,H, + 50, → Co, + 4 H,O P mol 0.05 Air JA mol Co + ½ 0, - Co, N2 0.05 1.00 mol frs 02 0.21 N. 0.79...

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