The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?
Correct answer: A. 3
- A. 3
- B. 12
- C. 22
- D. 0.3
Explanation
High-temperature carbonisation of coal is designed mainly to produce coke, and the associated tar yield is relatively small, typically about 3% of the coal charge. Lower-temperature carbonisation gives a substantially higher tar yield.
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