Compressors, Gas Turbines and Jet Engines
Rotary compressors are used for delivering

Small quantities of air at low pressures
Small quantities of air at high pressures
Large quantities of air at low pressures
Large quantities of air at high pressures

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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
Carbonisation of coal
Passing air and a large amount of steam over waste coal at about 65°C

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