Finding fuel composition and air-fuel ratio from combustion products

[zainulariffin]

Homework Statement

hi guys, i have problem regarding this matters.

Products : hydrocarbon

if i have this :

CO2 - 80%
CO - 0.9%
O2 - 8.8%
N2 - 82.3%

1) how to determine the composition of the fuel?

2) the air fuel ratio?
known , the air fuel ratio is : mass of air / mass of fuel

how can i get the mass base on the given data?

3) the percentage of excess air used.

please help advice to settle this problem.

regards,

zainul

 

[chemisttree]

Homework Statement

hi guys, i have problem regarding this matters.

Products : hydrocarbon

if i have this :

CO2 - 80%
CO - 0.9%
O2 - 8.8%
N2 - 82.3%

1) how to determine the composition of the fuel?

2) the air fuel ratio?
known , the air fuel ratio is : mass of air / mass of fuel

how can i get the mass base on the given data?

3) the percentage of excess air used.

please help advice to settle this problem.

regards,

zainul

So you have a gas mixture composed of 80% CO2 and 82.3% N2?

Nonsense! Think about it some more and get back to us...

 

[zainulariffin]

sorry, typo error..

CO2 - 8.0%

 

[Borek]

Products : hydrocarbon

if i have this :

CO2 - 80%
CO - 0.9%
O2 - 8.8%
N2 - 82.3%

No idea what the question is. Please don't ignore homework template - it requires you to post the question verbatim, not just some subset of the information.

You mentioned hydrocarbon, so regardless of what the gas mentioned is I would expect it to contain water - but it is not listed.