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Fuels and Combustion

Fuels and Combustion
Blast furnace gas constitutes mainly of

N₂ & CO
CH₄ & CO₂
N₂ & CH₄
N₂ & H₂

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Fuels and Combustion
Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant?

Ammonium sulphate
None of these
Ammonium phosphate
Ammonium nitrate

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Fuels and Combustion
Washing of coal decreases its

Ash content
Caking index
Mineral matter content
Both B and C

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Fuels and Combustion
The calorific value is the highest out of the following for

Producer gas
Coke oven gas
Blast furnace gas
Water gas

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Fuels and Combustion
Coal is pulverised before burning in large capacity boiler furnaces mainly to

Ensure its complete combustion
Facilitate easy ash removal
Enhance its calorific value
Provide trouble free operation

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Fuels and Combustion
In Lurgi coal gasifier,

Larger quantity of coal can be processed
Coking coals cannot be used
Entrainment of solids is higher
Low carbon conversion efficiency is achieved

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