2 replies to this topic

[Spliknot13]

Given:

Stack gas  mole% = 8.5% CO, 5.53%O2     

excess air = 25%

efficiency = 80%

 

Things to solve for:

% N2 on stack gas

if 100 kmoles of stack gas are present how many moles are there in the feed

what is the hydrocarbon present

 

Ive tried solving it using efficiency as the % of the Carbon and hydrogen atoms in the fuel that was fully combusted. Then again problem becomes overspecified I think and values I get are negative. My question is is there enough information given in the problem if efficiency is only used to solve the amount of feed from the amount of stack gas? Any help would be appreciated. Thanks

[s23]

take the efficiency as the amount of Hydrogen and carbon converted. by that i think you will be able to solve the problem

[Bobby Strain]

So, maybe you should ask what efficiency is. Or maybe you covered this in your class. You could have been asleep when the subject was discussed. Classmates are usually helpful.

 

Bobby