Which of the following components has the highest percentage in coal oven gas?
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A.
Methane (CH4)
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B.
Carbon dioxide (CO2)
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C.
Carbon monoxide (CO)
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D.
Hydrogen (H2)
Correct Answer:
D. Hydrogen (H2)
Explanation:
Hydrogen (H2) is the primary component of coal oven gas, typically making up about 50% to 60% of its total volume. This fuel gas is created as a byproduct when bituminous coal is heated at high temperatures in an oxygen-free environment to produce coke. During this carbonization process, hydrocarbons decompose and undergo chemical reactions that release large quantities of hydrogen. Other significant constituents include methane (CH4) at approximately 25% to 30%, carbon monoxide (CO) at 5% to 10%, and smaller amounts of carbon dioxide (CO2) and nitrogen. Because hydrogen is the most abundant element released during the coking process, it represents the highest percentage among all the gases in the mixture.
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