4 replies to this topic

[Pires]

Hello,

 

I'am working in propylene/propane dryers optimization (in a refinery) and at the moment i want to simulate the effectiveness of the adsorvent (molecular sieve 3A and activated alumina) but i'am not sure what software i can use. Already tried to check Aspen, but it don't have dryers for the simulation.

 

I would like to ask if anyone already did something similar to this, and if yes, what software did you used for the simulation?

 

Also, i'am trying to find some information (in articles/books) of the isotherms of the system but it seems very hard to find something about it.

 

Thanks,

Pires

[Bobby Strain]

You should best contact sieve and alumina suppliers. It's not likely that you can adequately simulate adsorption. Are the dryers currently installed? Or, are you looking at a new installation? Your water specification is important, too. You can also dry with a fractionator.

 

Bobby

[Pires]

Bobby,

 

The dryers are already installed. The objective was to understand which adsorvent fits in the best way: molecular sieve 3A, activated alumina or both. I want less than 70 ppm (wt). I already contacted the supplier and they can only send me their simulation results.

 

Pires

[Bobby Strain]

The supplier results should be all that is necessary to make a choice. It's an economic decision. Unless the regeneration system was designed for alumina or silica gel with lower temperature regeneration. Generall, 3A sieves require a higher regeneration temperature than alumina. But your water specification is not too stringent. If you have other contaminates to remove, sieves might do that, too.

 

Bobby

Edited by Bobby Strain, 06 November 2015 - 05:08 PM.

[Pires]

Bobby,

 

Thanks for the reply.

Since i can't make the simulation in a software, is it possible to make an excel simulation of the lagmuir isotherm?

 

Pires