Compressors, Gas Turbines and Jet Engines
Producer gas is produced by

Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Passing steam over incandescent coke
Passing air and a large amount of steam over waste coal at about 65°C
Carbonisation of coal

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Compressors, Gas Turbines and Jet Engines
The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is

Bled gas from turbine is heated and readmitted for complete expansion
Heated
Compressed air before entering the combustion chamber is heated
Exhaust gases drive the compressor

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