Types of Coal

Introduction

Coal, like oil, consists of a wide variety of components, and those components are present in a wide variety of concentrations within various coal deposits. In order to simplify descriptions of coal in its multiple forms, four main categories of coal have been commonly used:


  • Anthracite - contains 86-97% carbon
  • Bituminous - contains 45-86% carbon
  • Subbituminous - contains 35-45% carbon
  • Lignite - contains 25-35% carbon