Fuels and Combustion
Beehive coke oven

Takes 2-3 days for coking of coal but requires no external fuel for heating
Gives larger yield of coke (around 85%) as compared to by-product ovens
Produces coke with very poor strength
Facilitates by-products recovery

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Fuels and Combustion
Rate of low temperature oxidation of coal due to bad storage conditions

Is more for low volatile coal compared to high volatile coal
Does not vary with increase in surface area
Is accelerated by storage in large heaps with small surface to volume ratio
Decreases with increase in surface area

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