Fuels and Combustion
Out of the following, which is the most important parameter for the blast furnace grade coke?

Ash content
Moisture content
Volatile matter content
CSR & CRI

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Fuels and Combustion
A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

21% excess air has been used for combustion
Complete combustion of fuel has taken place
21% excess oxygen has been used for combustion
No excess air has been used for combustion

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