×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Proximate to Ultimate Coal Analysis

Proximate to Ultimate Coal Analysis

Proximate to Ultimate Coal Analysis

(OP)

Gentlemen

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

athomas236

RE: Proximate to Ultimate Coal Analysis


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)
.

RE: Proximate to Ultimate Coal Analysis

(OP)
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

RE: Proximate to Ultimate Coal Analysis

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%?

RE: Proximate to Ultimate Coal Analysis

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

RE: Proximate to Ultimate Coal Analysis

(OP)
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

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources