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

Low Flow in Pipes- posted in Ankur's blog

Solubility Of Hydrocarbons In Brine


This topic has been archived.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

#1 New Chemi

New Chemi

    Brand New Member

  • Members
  • 1 posts

Posted 03 June 2014 - 03:46 PM

Hi Everyone.

 

I am trying to calculate solubility of ethane, propane- propylene mix, iso-butane, n-butane and de-methanized Y-grade in brine.

 

Can anyone help me with formulas or provide any directions?

 

Thank you,

 

VJ 



#2 serra

serra

    Gold Member

  • Members
  • 310 posts

Posted 04 June 2014 - 07:04 AM

depending from operating conditions an option could be a EOS with specific mixing rules,

the selection of model should depend also from availability of specific parameters,

here I presume you have no experimental data to fit,

differently (you know solubilities) you may fit a model or

interpolate in a table of values.


Edited by serra, 04 June 2014 - 07:14 AM.


#3 MrShorty

MrShorty

    Gold Member

  • ChE Plus Subscriber
  • 517 posts

Posted 04 June 2014 - 09:41 AM

I might be revealing my own ignorance of "standard industry parlance". My first question when reading this was one of context: are you talking about 2 phase equilibrium/solubility (vapor + liquid phases) or 3 phase equilibrium/solubility (vapor + hydrocarbon liquid + aqueous liquid)? Theoretically, there is not always a lot of difference in the thermodynamic equations for vapor+liquid and liquid+liquid equilibrium, but, in practice, I tend to think about them differently. For example, if this is a "gas" solubility type problem (2 phase), then I might be looking for Henry's constants and try using Henry's law for my computations. If this is a liquid/liquid problem, I might be thinking more in terms of activity coefficients and how to solve the activity coefficient equation for mutual solubilities.

 

Quantitatively, I would tend to start with the case for pure water. It depends a lot on exactly what I am doing. For a "seat of the pants, empirical estimate", I would calculate the desired solubility in pure water, then state some kind of "correction" for the how the salt might increase/decrease the solubility and work from there. Considering how insoluble hydrocarbons are in water, even if I am in error, I am still showing that the hydrocarbon is very insoluble.






Similar Topics