Issues with temperature in the Aspen glycerol deformalization stripper? Seeking expert advice?
Thread Content
I have been using Aspen to simulate a stripping column recently, with the Radfrac module, to remove formaldehyde from glycerol through saturated vapor stripping. Without a reboiler or condenser, the feed temperature is 100 degrees at atmospheric pressure, and 143 degrees for 4 kilograms of steam. The tower is also operated at atmospheric pressure; then why are the temperatures at the top and bottom of the tower both over 150 degrees according to the calculations? Higher than the temperature of the material? Without a reboiler, where does the heat to raise the temperature come from? Does glycerin release a large amount of heat when it comes into contact with water? Is it something I set up incorrectly? I hope someone experienced can help me figure this out! Thank you so much!
The attachment has been uploaded. Bro, please take a look at it!
The version is too high to be opened. Based on your parameters and temperature, I’ve done the calculations myself; the inlet and outlet values won’t exceed 150 – they’ll be around 130 instead. I’m not quite sure what the issue is. It’s possible that you have different equation of state settings; please check those settings, or create a new file and try again.
Bro, could you send me a copy of your file?
Bro, what kind of physical property method did you choose?
When this problem occurs, you can try adding a nitrogen component to the feed