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The gas produced by the passage of air over hot coke is
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producer gas
The gas produced by passage of air over hot coke is called producer gas. The reaction proceeds as:
$$
2 \mathrm{C}+\underbrace{\mathrm{O}_2+\mathrm{N}_2}_{\text {Coke }} \stackrel{\Delta}{\longrightarrow} \underbrace{2 \mathrm{CO}+\mathrm{N}_2}_{\text {Producer gas }}
$$
Other carbonaceous (carbon containing) fuels also produce producer gas of different compositions.
$$
2 \mathrm{C}+\underbrace{\mathrm{O}_2+\mathrm{N}_2}_{\text {Coke }} \stackrel{\Delta}{\longrightarrow} \underbrace{2 \mathrm{CO}+\mathrm{N}_2}_{\text {Producer gas }}
$$
Other carbonaceous (carbon containing) fuels also produce producer gas of different compositions.
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