Which of the following has the highest gross calorific value ?
Correct answer: D. Oil refinery gas
- A. Blast furnace gas
- B. Coke oven gas
- C. Carburetted water gas
- D. Oil refinery gas
Explanation
Oil-refinery gas contains substantial hydrogen-rich hydrocarbons and therefore has a higher gross calorific value than coke-oven gas, carburetted water gas, or blast-furnace gas. Blast-furnace gas is especially low in heating value because it contains much nitrogen and carbon dioxide.
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