fraction of calorific value of coal in Coke

fraction of calorific value of coal in tar

fraction of calorific value of coal in coke oven gas

unaccounted calorific value of coal =1-(0.6618+0.0429+0.2172)=0.0781.

This shows that 7.81%of calorific value of coal is being utilized in raising temperatures of coke oven gas and tar to the discharge temperature.

(2) A by- product coke-oven carbonizes coal of the composition  and ash 7.5. The Coke produced contains C 88.2%, H 0.2% and ash 11.6%. Tar contains 52kg carbon . The Coke-oven gas produced analysed

Calculate  per ton of coal.
      i   Amount of coke
      ii  Amount of coke oven gas.
      iii  Fraction of calorific value of coal (a) in coke and (b) Coke- oven gas.

Answer: 

      i    647kg
      ii   536  m3 (1 atm, 273 K)
      iii  (a) 0.63  (b) 0.34 

Those interested to solve more problems, see the following book.

   1.   A Butts Metallurgical problems.