2 replies to this topic

[JinjoVitis]

Hello, 

 

I am deigning a distillation column and would like to know what criteria goes into choosing the temperature of the column (partial reboiler). In my case, I am separating ethylene glycol from water. 

 

Thanks in advance

[AlertO]

Dear JinjoVitis

The criteria to have a feed temperature is normally from doing the optimization. The selected temperature will show the ease of separation leading to low investment and operating cost. However, there is a typical rule of thumb that you can apply for your design i.e. Regeneration of the glycol by atmospheric distillation at about 200 °C achieves about 1 weight % water in regenerated glycol.
Anyway, too high temperature will lead the glycol to degenerate. Please be aware of this.

Hope this may help you

[JinjoVitis]

Thank you very much