Question

How many types of coal are there? Write there characteristics and percentage of carbon in them

Answer 1

Answer:

There are four types of coal, ordered from highest to lowest rank below

Types, or “ranks,” of coal are determined by carbon content.

• Anthracite, or “hard coal,” contains the highest amount of carbon out of all coal ranks (86%-97%). It has a brittle texture and lustrous sheen. It is used mostly in industrial settings and the metals industry due to its high heat value. Anthracite is rare in the United States, only making up 0.2% of coal production in 2017.

• Bituminous coal, often called “soft coal,” has slightly lower carbon content than anthracite (45%-86%).The wide range of carbon content in bituminous coal warrants use for both electricity and steel production. It can be identified through its shiny luster and layered texture.

• Subbituminous coal does not have the same shiny luster as higher ranked coals. As the name suggests, it has lower carbon content than bituminous coal (35%-45%) and is primarily used for electricity generation

• Lignite is often called “brown coal” because it is lighter in color than the higher ranks of coal. It has the lowest carbon content out of all the coal ranks (25%-35%) and it has a high moisture content and crumbly texture. It is mainly used in electricity generation

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