Proximate to Ultimate Coal Analysis

[athomas236]

Gentlemen

Do any of you know a method by the ultimate coal analysis can be estimated from the proximate analysis?

athomas236

 

[mbeychok]

I may be wrong, but I am fairly sure that there is no way to estimate the ultimate coal analyis from the proximate coal analysis.

Milton Beychok
(Visit me at www.air-dispersion.com)
.

 

[athomas236]

mbeychok,

I have found the following empirical relationship to convert ‘proximate analysis’ to ‘ultimate analysis’ for Indian coal.

%C = 0.97C+ 0.7(VM+0.1A) - M(0.6-0.01M)
%H2 = 0.036C + 0.086 (VM -0.1xA) - 0.0035M^2 (1-0.02M)
%N2 = 2.10 -0.020 VM

Where
C = % of fixed carbon
A = % of ash
VM = % of volatile matter
M = % of moisture

Proximate analysis in on air-dried basis and ultmate analysis is on dry basis.

The reason for my question is to find out if there are other methods.

Regards,

athomas236

 

[bellhana]

Do any of you know about troubles with buncker c oil combustion in power plant, specially the content change
from carbone residue 10%, ash 0.05% to carbone residue 14%, ash 0.08%?

 

[Feric]

Hi there:

There are some tables out there -- textbooks, internet sites etc. -- that contain both ultimate and proximates coal analysis composition for common coals.

This approach can be used as the first step when making quick engineering evaluations ...

Thanks,

Gordan Feric, PE
Engineering Software

http://members.aol.com/engware

 

[athomas236]

I am still looking into this and have found a method, called the Gebhardt formula in the book "Power Plant Performance" by A B Gill. Mr Gill was Efficiency Engineer at Drakelow Power Station in the UK.

athomas236