Which fuel is prepared by heating bituminous coal continuously for 15 to 18 hours in closed chamber?(a) Charcoal(b) Anthracite(c) Coke(d) Briquette coalI had been asked this question in semester exam.This is a very interesting question from Artificial Solid Fuels & Liquid Fuels in section Steam Power Plant of Energy Engineering

Which fuel is prepared by heating bituminous coal continuously for 15

1.	Which fuel is prepared by heating bituminous coal continuously for 15 to 18 hours in closed chamber?(a) Charcoal(b) Anthracite(c) Coke(d) Briquette coalI had been asked this question in semester exam.This is a very interesting question from Artificial Solid Fuels & Liquid Fuels in section Steam Power Plant of Energy Engineering
Answer» Right choice is (c) Coke To explain: Coal is prepared by heating bituminous coal continuously for 15 to 18 hours in closed chamber in the absence of air 500^oC to 700^oC. During this process the volatile matter is removed from the coal, leaving a dull black color to coke. It is a hard porous STRUCTURE and smokeless. It contains 85 to 95% CARBON. When the bituminous coal is HEATED between 900^oC to 1000^oC, hard coke is produced. It is used in gas producing PLANTS and blast furnaces.

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