The most common coal analysis is proximate analysis. It is used on coals during exploration, mining, and preparation. Four different parameters are measured from one sample in a proximate analyzer, which is an automated instrument.

  • Ash yield (the material in coal that will not combust)
  • Fixed carbon(the remaining carbon in coal after combustion)
  • Moisture (the moisture content in coal)
  • Volatile matter(the compounds that will be converted to gas in coal during combustion

Standard methods for proximate analysis are shown in ASTM D3172-07a (American Society for Testing and Materials, 2013, p. 492-493). Different standards cover each component of the analysis (moisture, etc.).

Sample cups are placed in a proximate analyzer for automated measurement of ash yield, fixed carbon, moisture, and volatile matter.


Compare with Ultimate Analysis

  • If you have specific questions about this analysis, please contact Jason Backus.





Last Modified on 2018-06-22
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