Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?
Correct answer: B. Natural gas
- A. Blast furnace gas
- B. Natural gas
- C. Producer gas
- D. Water gas
Explanation
Natural gas is mainly methane, whose combustion requires about 9.5 Nm³ of air per Nm³ of gas. Blast-furnace, producer and water gases contain substantial CO, H₂, CO₂ or N₂ and therefore need less air.
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