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sawhai
sawhai is offline
#1
Mar7-12, 08:56 PM
P: 28
1. The problem statement, all variables and given/known data

A fuel oil burned in a steam generator has a composition that may be represented as C15H32.

A dry basis analysis of the flue gas yields the following molar composition: CO2 10.111%,
CO 1.000%, O2
5.611%, and N2 83.278%.

Determine the following:
(a). The percent excess air used to burn the fuel oil;
(b). The flue gas molar composition on a wet basis, reporting all constituents, including
water vapor, to the nearest 0.001%; and
(c). The dew point temperature (C) of the flue gas, if the pressure exiting the combustion
stack is 180 kPa


2. Relevant equations
Excess air = (actual air- stoichiometric air)/actual air


3. The attempt at a solution
Since there is CO in the product, it means that part of the fuel undergoes incomplete combustion. I am trying to find the percentage of the fuel that undergoes the full combustion and the percentage that undergoes partial combustion.
C5H32 + 13 O2 ->5CO2 + 16 H2O ------>complete combustion
C5H32 + 10.5 O2 ->5CO2 + 16 H2O ---------> Partial combustion
I am not sure where to go next.
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