Which of the following has the least calorific value (kcal/Nm3) ?
Correct answer: A. Blast furnace gas
- A. Blast furnace gas
- B. Coke oven gas
- C. Sewage gas
- D. Natural gas
Explanation
Blast furnace gas is heavily diluted with nitrogen and carbon dioxide, so its heating value is only about 800 to 1,000 kcal/Nm³. Coke-oven gas, sewage gas and natural gas contain considerably more combustible components.
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