Coal Types Of Coal Peat Lignite Bituminous Coal
Jan 25, 2016 Coals are classified into three main ranks, or types lignite, bituminous coal, and anthracite. These classifications are based on the amount of carbon, oxygen, and hydrogen present in the coal. Coals other constituents include hydrogen, oxygen, nitrogen, ash, and sulfur. Some of the undesirable chemical constituents include chlorine and sodium.