Exercise-I

In a furnace, iron ore is reduced according to the following reaction:

 

Coke of composition  C is used to produce CO by combustion with air at the bottom of the furnace. Of the coke charged,  is absorbed by iron and  burns to CO only. No  is produced by combustion of coke.


Calculate  

1. Volume of CO to produce 1000Kg iron.
2. Weight of coke required to produce 1000Kg iron.
3. Volume of air to burn the coke amount determined in 2)
4. Volume and % composition of gases formed in combustion.
5. Volume and % composition of gases resulting in combustion and reduction
   
   

Solution

From the reaction

  

Moles of  kg moles

Volume of                                            (a)

Coke required   kg                             (b)

Volume of air
 

Volume of air  

                                                                    (c)

Gases formed (kg mole)     %                                             (d)
                       
                    
                                           
      
Gases formed during combustion and reduction comprise of CO, CO₂ and N₂. The amount in kgmoles and percent are given below