What is proximate analysis of coal?

Question

Accepted Answer

Proximate analysis of coal is a method to determine the moisture, volatile matter, fixed carbon, and ash content of coal.

Proximate analysis is used to assess the quality and suitability of coal for various applications.
It involves determining the percentage of moisture, volatile matter, fixed carbon, and ash present in the coal sample.
Moisture content indicates the amount of water present in the coal.
Volatile matter represents the combustible components that vaporize during coal combustion.
Fixed carbon is the solid residue left after volatile matter is driven off.
Ash content refers to the inorganic mineral matter present in coal after combustion.
Proximate analysis helps in determining the heating value, coking properties, and combustion characteristics of coal.
For example, high moisture content can reduce the heating value of coal.
Different coal types have varying proximate analysis results, which impact their suitability for specific uses.

Top AMS Mining Research Organisation Chemist interview questions & answers