Greenhouse gas emissions are associated with production of silicon carbide (SiC) and calcium carbide (CaC2). The production of carbide can result in emissions of carbon dioxide (CO2), methane (CH4), carbon monoxide (CO) and sulphur dioxide (SO2). Silicon carbide is a significant artificial abrasive. It is produced from silica sand or quartz and petroleum coke. Calcium carbide is used in the production of acetylene, in the manufacture of cyanamide (a minor historical use), and as a reductant in electric arc steel furnaces. It is made from two carbon-containing raw materials: calcium carbonate (limestone) and petroleum coke.
Use of carbon-containing raw materials in the production processes result in emissions of CO2 and CO. The presence of hydrogen-containing volatile compounds and sulphur (S) in the petroleum coke may cause formation and emission to the atmosphere of CH4 and SO2.
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