# Unburnt Carbon equation balancing in Boilers

1. Apr 26, 2014

### driving_seat

Hi there,

Hope you all are doing good.

I was reading a book on boilers and burners design and had a problem in understanding some part of the text which I have attached below

The problem is I not comprehend that

1. How unburnt carbon mass can be achieved by subtracting CO2 * 12/44
2. The units of the second picture are not being achieved.

If anyone can help me in this regard, i would be very glad.

Last edited: Apr 26, 2014
2. Apr 26, 2014

### driving_seat

I forgot to attach the file... please see it here

3. Apr 26, 2014

### 256bits

Answer 1. What is the atomic/molecular mass of carbon, oxygen and carbon dioxide?
Answer2. There is no second picture . If you mean equation 3-28 why do you think units are not correct?

4. Apr 28, 2014

### driving_seat

Hey hello 256 bits. thanks for help.

I did a quick calculation of the first question and I got the answers.

I did the solution like this

C_total = C_burnt + C_unburnt
C_unburnt = C_total - C_burnt

As the C_burnt forms CO2, therefore C_burnt = 12/44*CO2

C_unburnt = C_total - 12/44*CO2

----------------------------------------------------------

As for the second question, yes I am talking about 3-28. I reattempted the solution, but could not get the balanced units. Any help in this regard is highly appreciated.