http://en.wikipedia.org/wiki/Heat_of_combustion

That table is weird, it mentions "Coal, Anthracite" and "Coal, Lignite" but not bituminous.

Lignite is also known as "Brown Coal", it's a few thousand years or a few thousand tons per square foot short of becoming coal.

Good AnswerMJCronin. Govind, You also need to clarify what it is that you mean by volatile matter. Do you mean "everything except ash?" Or do you mean everything driven off in the coke making process, leaving behind the coke?

Given the definition of coke we were given back as a pup, we think that this might be closer to what you want than the "everything but ash," But who knows?

"Coke is the solid coherent cellular residue resulting from the destructive distillation (driving off of volatile components) of Bituminous coal."

In this case the calorific value of the driven off volatiles PLUS the calorific value of the remaining coke would EQUAL the calorific value of the Original Coal. Milo

Dear Govind Rao, MJCronin is correct, in addition, testing methods and procedures differ by local. In Germany I believe it would be in this form Q=Vn ΔHhc -hope this helps I don't know where in the world the republic of PA is... next to the commonwealth of PA I suppose.

No need. Look it up in Kempe's Engineers' Yearbook, any edition.

Kinldy send me a formular of different formulae with the units, to calculate the calorific Value of Volatile Material in coal after charring the in MJ/kg. This would be at higher temperatures than 900°C. Please e-mail to carpedsd@eskom.co.za

Regards

Deborah