Fuels and Combustion
Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces

Higher amount of both methane and hydrogen
Higher amount of methane
Both A & B
Lower amount of hydrogen

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Fuels and Combustion
Froth floatation is used for

Removing ash from the coal based on difference in specific gravity of coal and ash
All of these
Washing lump coal (> 80 mm size)
Washing fine coal dust (< 0.5 mm size)

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