Question

Ultimate analysis of coal determines

• A. Carbon, ash, sulphur and nitrogen
• B. Moisture, volatile matter, ash and carbon
• C. Carbon, hydrogen, oxygen and sulphur
• D. Carbon, hydrogen, nitrogen and sulphur

Hint:

Proximate analysis gives moisture, volatile matter, ash, and fixed carbon. Ultimate analysis gives elemental composition of coal.

Answer 1

The Correct Option is D

Coal analysis is mainly of two types: \[ \text{Proximate analysis} \] and: \[ \text{Ultimate analysis}. \] Proximate analysis determines: \[ \text{Moisture, volatile matter, ash, and fixed carbon}. \] Ultimate analysis determines the elemental composition of coal. It gives the percentage of elements such as: \[ C,\ H,\ N,\ S,\ O. \] In the given options, the group representing ultimate analysis is: \[ \text{Carbon, hydrogen, nitrogen and sulphur}. \] These elements help in calculating combustion requirements, calorific value, and flue gas composition. Therefore, ultimate analysis of coal determines: \[ \text{Carbon, hydrogen, nitrogen and sulphur}. \]