Steam Boilers, Engines, Nozzles and Turbines
Coke is produced by

Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Pulverizing coal in inert atmosphere
Heating wood in a limited supply of air at temperatures below 300°C
Enriching carbon in the coal

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Steam Boilers, Engines, Nozzles and Turbines
The ultimate analysis of fuel lists

Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

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