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coke
A form of amorphous carbon (also containing ash, volatile residues, and sulfur) remaining when bituminous coal is heated in special furnaces to distill off the volatile constituents. Before the exploitation of natural gas, much coal gas was thus produced. In the United States, 95% of coke is used in metallurgy, mostly in blast furnaces. Such coke must be strong (to support the weight of the charge), porous, and relatively pure. Some coke is used as a smokeless fuel, and to make water gas.
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• INDUSTRIAL CHEMISTRY
• ORGANIC CHEMISTRY
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