Question

6. Determine the Air/Fuel ratio by mass for a fuel approximating to hexane CsH14 when only 80% of the air required for stoichiometric combustion is provided. Also perform wet volumetric analysis on the combustion products at temperature of 25 °C and pressure of 1 bar. [20 marks]

Please provide step by step annotated solution for the question above, we are given the following numerical answers to work towards:

A/F by mass = 12.14; Wet analysis: CO₂=6.15%, H₂O=3.16%,CO =10.64% and N₂=80.04%

Answer 1

sto1chome o ab air Tequ Cormbutom er fect chenni cal Reachom (Ass 79 % 21 &sume in air 어02. equotngc mole In both kide lualin ing O molen In both Ktdej "X=9.5 2-l 2 Ha Yea ch trn Is very fa사 So it Con consume0,very equating chole equating O、moles dte 2d +e = 8.2. faom bolh equaon d2 2 e=3.8

So Reacton 21

7.6 kmol 32 79 kmol 2.27 3.8 +7.6 x 7 7 0-1689 79 al - 16.83 % 3.В 9.136 /. 7.6x 79 O 6 8792 2 x79 2 =68.792%