Material balance in coke-making

In coke making, coal of certain composition is carbonized in a by-product coke oven. As a result of carbonization, products and by-products are produced. Main product is coke, whereas by-products are coke oven gas and tar. The following block diagram represents material balance: coal of certain composition is charged and coke, coke oven gas and tar of certain composition is produced.

Basis of calculation: one may take 1 Kg coal, 100 Kg coal or 1000 Kg coal.

Amount of coke is determined by ash balance, namely If W Kg is amount of coke then ash balance is

By knowing weight of tar, W can be calculated.

Amount of coke oven gas can be calculated by carbon balance:

In the present illustration, if Y Kg mole is the amount of producer gas