Chapter 7 COAL - Pennsylvania State University
Bituminous coals 300,000,000 76-90 Anthracites 350,000,000 90-95. COAL 117 Properties of Coal Although it is customary to use the word ‘coal’ in the singular, if we assembled a collection of coal specimens from around the world, we would find that this word is actually applicable to materials having a rather wide range of properties. One,What are the types of coal? - USGS,Rank refers to steps in a slow, natural process called “coalification,” during which buried plant matter changes into an ever denser, drier, more carbon-rich, and harder material. The four ranks are: Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high,Difference Between Anthracite Coal and Bituminous Coal,,Sep 28, 2011· Bituminous Coal. Bituminous coal is the most abundant type coal. It is soft and contains a substance called bitumen, which is similar to tar. The carbon percentage in bituminous coal is normally between 77-87%. And there is water, hydrogen, sulfur and few other impurities.