Answer to Question #17030 in Inorganic Chemistry for saloni

Question #17030
what are the properties of coal?
Expert's answer
The most important properties of coal are as follows:
• Proximate analysis - to determine the moisture, ash, volatiles matter and fixed carbon
• Ultimate or elementary analysis - to determine the elemental composition of the coal
• Calorific value
• Caking properties - for bituminous coals only
• Grindability - where the coal is to be pulverized
Various properties of coals which gives rise to the manufacture of coke&
& Chemical properties:
•& Carbon:& The elements carbon expressed on dry mineral matter free (DMMF) basis should vary between 85-88%.
•& Hydrogen: The hydrogen DMMF basis should vary between 3.7 to 4.5%.
•& Sulpher:& In& the suplher both organic && inorganic& should not exceed 0.75%
on DMMF basis.
•& Phosphorous: The Phosphorous present in the coking coal should not exceed
0.15 – 0.25%.
•& Other& elements:& Such& as& Nitrogen,& Iron& & Other& rarer& elements must& be
present in traces.

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