Fuels and Combustion
Narrow coke ovens as compared to wider coke ovens

Produce stronger coke
Require less time of carbonisation
Produce smaller coke
All of these

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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
Facilitates by-products recovery
Takes 2-3 days for coking of coal but requires no external fuel for heating

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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

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

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