Fuels and Combustion
Which of the following is not applicable to fluidised bed combustion of coal?

It achieves higher fuel combustion efficiency
Less heat transfer surface area is required in boilers
None of these
It can not burn low grade coal

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP