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


Octane Predictor

Octane Predictor

Octane Predictor

Hello Friends,
I would like to know if there is a mathematical correlation that can be used to predict reformate octane.
Kindly assist.

RE: Octane Predictor

There are mathematical correlations based on empyrical studies to predict the octane of many refinig products. Most of them use as input PIONA gas cromatographic analysis. So, GC licensors incorporate these correaltions in their software (normally these correlations are too general, they more or less work for any refinery stream, but with a low precision for each specific stream).
There are also specific GC methods for octane determination from GC-PIONA. Some of these studies are published, the most famous being the method developed by Anderson et al. (you can find the references in Google) and tehre are also commercial GC equipment + software specifically designed for this purpose: GC-ON from Grace Davison and Carburane from IFP. These methods include specific correlations for each refinery stream (one correlation for FCC naphtha, other for reformate, and so). Indeed, you basically pay for the correlation developed from a third party, that include the analysis and correlation from a huge number of samples.
Alternatively, you could also developed your own correlation. This will be the most precise, but also the most time and resource consuming (you need support from a laboratory and time to develope your own naphtha samples database).

There are also methods that correalte octane from infrared (or near infrared) spectrometer. But I am not familiar with this specific technique

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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close