Presence of free moisture in coal during its high temperature carbonisation _____________________?
Correct answer: B. Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot
- A. Reduces the coking time
- B. Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot
- C. oven walls
- D. Increases the loss of fine coal dust from the ovens when charging
- E. None of these
Explanation
Free moisture absorbs heat and generates steam during carbonisation, which helps shield volatile products from cracking against the hot coke and oven walls. It generally does not reduce coking time, so the protective effect identifies option b.
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