Undercharging of coal in the by-product coke ovens results in ____________________?
Correct answer: C. Decrease in the c.v. of coke oven gas
- A. Increase in the c.v. of coke oven gas
- B. Increase in its throughput
- C. Decrease in the c.v. of coke oven gas
- D. No change in the c.v. of coke oven gas
Explanation
Undercharging leaves more free space and exposes the evolved vapours to stronger heating, promoting cracking of hydrocarbon vapours. This reduces the proportion of high-calorific hydrocarbons in the coke-oven gas and lowers its calorific value.
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