Fuels and Combustion
Calorific value of

Light paraffinic fuel oils is higher than that of equivalent olefins
Light paraffinic fuel oils is lower than that of equivalent olefins
Light paraffinic fuel oils is equal to that of equivalent olefins
N-paraffin is lower than that of iso-paraffins of the same compounds

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Fuels and Combustion
Lignite is

A black banded coal which burns with a non-smoky yellowish flame
A high rank coal
A coking coal
Can be used for gasification and steam generation

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Fuels and Combustion
Beehive coke oven

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

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