Fuels and Combustion
Lignite is

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

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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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