Name the process that occurs when coal is burned on a limited air
Answers
Answer:
Explanation:
Incomplete combustion of coal is some combination of pyrolysis and gasification depending on the level of oxygen. At a high level, we can think of the products of each of these reactions as one of two mixed substances:
Tar: “tars” are extremely viscous, oily liquids (at room temperature), usually composed of hydrocarbons with a substantial but varying degree of polymerization, contain a high proportion of aromatic substances, and to varying degrees will be mixed with water. Tar results from the pyrolysis reactions, which operate most independently of oxygen.
Syngas: Syngas, or “synthesis gas,” also called “coal gas” or “town gas” in older material, is a mixture of gaseous carbon monoxide, hydrogen, carbon dioxide, hydrogen, and water. Syngas results from gasification reactions, which depend heavily on oxygen.