Fuels and Combustion
Beehive coke oven

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
Gives larger yield of coke (around 85%) as compared to by-product ovens

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Fuels and Combustion
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Low calorific value of the fuel
Presence of large quantity of hydrogen in the fuel
High sulphur content in the fuel
Lack of thorough mixing of fuel with air

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