Butane/Propane (LPG) Equilibrium Diagram
Butane/Propane (LPG) Equilibrium Diagram
(OP)
Hi everyone, i´m trying to design a distillation column to separate a mixture of butane/propane (LPG) using the McCabe-Thiele method. Does anyone know where can i find this XY Equilibrium Diagram?
Thank You
Mauer
Thank You
Mauer





RE: Butane/Propane (LPG) Equilibrium Diagram
The McCabe-Thiele diagram method is only good for a binary mixture. I want to point out that LPG could be a multi-component mixture of n-propane, iso-propane, n-butane, iso-butane and perhaps even some of the various butylenes. The exact composition of the LPG depends upon which refinery produced it and when they produced it.
I would also point out that the McCabe-Thiele method is rarely used any longer in industry. One of the various available simulation models is far more commonly used. Is this question of yours perhaps just a homework problem?
Milton Beychok
(Visit me at www.air-dispersion.com)
.
RE: Butane/Propane (LPG) Equilibrium Diagram
Certainly i'm still a student, but i posted this message because right now i´m working at a company that produces ecological refrigerants.
I'm involved in a proyect to separate butane and propane from GLP, and the first thing i thought of was to use the McCabe-Thiele method to get a raw idea of the dimension of the tower, treating GLP as a binary mixture.
I also checked your link and your book seems really intesting, i´m going to recomend it at my university. By the way if you're interested in ecological refrigerants you can visit www.ecofreezeinternational.com , the site is spanish but there's available an english version.
Gracias
Mauer
RE: Butane/Propane (LPG) Equilibrium Diagram
I also wanted to point out what might be an error (see my reference/definition below).
Isopropane (from http://zenstoves.net/Canister.htm)
The term isopropane suggests that this is structural isomer of propane, but since propane is a three carbon hydrocarbon, a structural isomer doesn't exist. Isopropane is instead a commercial term used to describe isobutane/propane mixes (and sometimes butane/propane mixes).
RE: Butane/Propane (LPG) Equilibrium Diagram
You are perfectly correct ... my fingers were moving faster than my brain. Thanks for picking up on my error.
Milton Beychok
(Visit me at www.air-dispersion.com)
.
RE: Butane/Propane (LPG) Equilibrium Diagram
Depropanizers are quite common. For tutorials look for books on petroleum processing, in particular sections on light ends fractionation, for example: Watkins' Petroleum Refinery Distillation (Gulf).
RE: Butane/Propane (LPG) Equilibrium Diagram
Mauer
RE: Butane/Propane (LPG) Equilibrium Diagram
Cheers,
Joerd
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Butane/Propane (LPG) Equilibrium Diagram
RE: Butane/Propane (LPG) Equilibrium Diagram
RE: Butane/Propane (LPG) Equilibrium Diagram
He doesn't have any software. Raoult's law should be OK for butane/propane system.
RE: Butane/Propane (LPG) Equilibrium Diagram
Cheers,
Joerd
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.