Engineering Thermodynamics
Producer gas is obtained by

Passing steam over incandescent coke
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Carbonization of bituminous coal
Passing air and a large amount of steam over waste coal at about 650°C

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Engineering Thermodynamics
Carnot cycle consists of

Two isothermal and two isentropic processes
Two constant volume and two isentropic processes
Two constant pressure and two isentropic processes
One constant volume, one constant pressure and two isentropic processes

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