In low temperature carbonisation of coal as compared to high temperature carbonisation _____________ produced is less?
Correct answer: D. Difference in gross & net calorific value of the coke oven gas
- A. Yield of ammonia present in coke oven gas
- B. Free carbon content in tar
- C. Yield percentage of coke
- D. Difference in gross & net calorific value of the coke oven gas
Explanation
Low-temperature carbonisation produces coke-oven gas with a lower hydrogen proportion than high-temperature carbonisation, so less water vapour is formed during combustion. Consequently, its gross-to-net calorific-value difference is smaller.
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