Fuels and Combustion
Coke oven gas is stripped of its H₂S and mercaptans content by

Bubbling it through dilute sulphuric acid
Adsorption on bog iron bed
Absorption in wash oil
Adsorption on silica gel

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Fuels and Combustion
Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

It reduces its flame temperature tremendously
The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
There are chances of explosion during preheating
It reduces its calorific value tremendously

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