Problems occur in ASPEN simulation for ethylene glycol recovery
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Dear fellow engineers, I have a question: I have been using ASPEN to simulate the ethylene glycol recovery process recently. The feed materials include ethylene glycol, diglycol, triglycol, tetraglycol, and hexaglycol. Why is it that in the first ethylene glycol recovery tower, ethylene glycol should appear among the light components at the top of the tower, but instead it appears almost entirely at the bottom of the tower? What’s the problem? I’d like some advice
A minimum azeotrope may have formed at the top of the tower
You first need to confirm whether a minimum azeotrope has formed, and then address the issue; solutions include heating a third component to break the azeotrope or using pressure swing distillation, among others