Fuels and Combustion
In Lurgi coal gasifier,

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

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Fuels and Combustion
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

Because, it alone produces unreactive coke
Neither A nor B
Both A & B
To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls

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