Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?
Correct answer: C. Natural gas
- A. Carburetted water gas
- B. Blast furnace gas
- C. Natural gas
- D. Producers' gas
Explanation
Natural gas is mainly methane, whose complete combustion forms about one volume of CO2 and two volumes of water vapour per volume of fuel, giving a large product-gas volume. The other listed gases contain substantial inert gases or less combustible material, so their product volume is lower.
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