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Earlier discussion
1 older comment kept for context.
Oluwaseun Adeyemi
Producer gas is CO + N\(_2\)
It is produced by passing a stream of air through re-hot coke. Nitrogen is inert and is thus left unreacted.
Water gas (CO + H\(_2\) in equal volume), it is prepared by passing of steam over white hot coke (1000\(^{\circ}\)C).
Synthesis gas is CO + 3H\(_2\). It is formed during industrial preparation of Hydrogen