Jump to content

Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Gasoline Blending- posted in Ankur's blog

Antoine's Constants?

This topic has been archived. This means that you cannot reply to this topic.
3 replies to this topic
Share this topic:
| More

#1 Helena_Ali


    Junior Member

  • Members
  • 10 posts

Posted 04 April 2008 - 04:04 PM

Where can I get Antoine's constants for ammonia and Co2?

#2 Art Montemayor

Art Montemayor

    Gold Member

  • Admin
  • 5,494 posts

Posted 04 April 2008 - 05:41 PM

Well, you can start right here at this Webiste. First, use the SEARCH function and this will take you to previous threads that discuss this subject. For example try:

Next, go to this Webiste's home page and click on the Free Software Section. You will find there a great collection of Free software - including an Excel Workbook that gives all 468 compounds and elements together with all of their important properties, including the coefficients for the Antoine equation as well as the Harlacher equation.

It looks like you came to the right place.

#3 resmihadi


    Junior Member

  • Members
  • 12 posts

Posted 05 April 2008 - 08:00 AM

just adding an information

Helena, u could find Antoin's Constant on Lange's Chemistry Handbook
In Chapter 'Vapour Pressure' you can find Antoin's Constant for many substance, also with the formula.


#4 Padmakar Katre

Padmakar Katre

    Gold Member

  • ChE Plus Subscriber
  • 987 posts

Posted 06 April 2008 - 06:56 AM

While making the calculation check your P and T ranges. There are 2 sets of the Antoine equations. The original Antoine equation has a 3 parameters or coefficients i.e. A, B and C. This provides good fit for all liquids given freedom to choose values for thse 3 parametrs to get the best fit.The equation fit sometimes become inadequate over wide range of the pressures (e.g. from 0.01 bar to 1000 bar) and in this case the fit can be imroved by the Extended Antoine Equation which has 5 parameters i.e. A,B,C,D and E.
Another simplest form is 2 parameter equation where the value of C is taken as - 43 (minus 43) throughout.

Similar Topics