Hello everyone. I am trying to simulate O2 pressure swing adsorption with Adsim because we need to optimize our exsiting oxygen generator. But the problem is that there is not any good book for learning Adsim (even Aspen tutorials are not very help for PSA simulation) and I got really stuck with this problem. Aspen Adsorption is really really difficult and it is not like other aspen simulation softwares at all! Can anyone help me to solve this problem since I do not have much more time! :(
I am more familiar with H2 Pressure Swing Adsorption but the concepts are the same with O2 PSA. There really isn't a lot to model. Air enters the PSA adsorption vessel O2 passes through and everything else is adsorbed. A small amount of O2 is adsorbed but most of the unrecovered O2 is O2 the was left in the vessel when the switch is made to another vessel. A simple PSA unit will have 2 vessels one online producing O2 and another "regenerating" by venting to the atmosphere.. If you are operating continuously you will probably want more than 2 vessels with pressure equalization and depressuring steps but with air separation you could get away with only two vessels (on online and the other regenerating by depressuring to the atmosphere) mutibed systems will allow pressure equalization between units to minimize he amount of O2 that is eventually vented to the atmosphere.
What is the purpose of you simulation? Are you attempting to increase O2 production? This is usually done by maximizing the amount of time adsorption vessels are online and minimizing the amount of O2 that is vented with the N2 via pressure equalization steps. If you know the purity of the N2 stream being rejected and the purity of the O2 product stream you can calculate the recovery of O2 with a simple algebraic expression.
i wrote a training book regarding aspen adsim/adsorption in Persian, you can purse it through andishe sara publication, in Tehran. Otherwise, please refer to your chemical engineering department, i am sure some body is familiar with it there, if not, try modeling it using MATLAB.
Hello,
Can you please check Aspen Adsim Help. I hope you will find something good from there.
Thanks,
Hi.
Even though Aspen Adsim and other Aspen related modeler have
more complicated language format than MATLAB modeling, but have the important advantage that can use from Aspen property package for physical property of each component in the model. You must define this property for each component if you want to use from MATLAB modeling.
I also have same problem as i am working on nitrogen poduction from the air seperation, ans i am trying to simulating it with aspen adsorption. Can anyone please enlight me or guide me as it is little bit difficult to understand without proper wxample.
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