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?
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?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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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?
Transcribed Image 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
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