Simulation of isooctyl acrylate dehydration tower

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When I was simulating the dehydrating tower for isooctyl acrylate, not only was the acrylate in the water not removed, but a significant amount of isooctanol from the feed at the top of the tower was also carried away. What’s going on? Could some expert help me simulate it? Feed at the bottom of the tower: 1500 kg/h (0.92 w/w H2O, 0.08 w/w C3H4O2); temperature: 110; pressure: 300 mmHG. Feed at the top of the tower: 2000 kg/h (C8H18O – octanol); temperature: 50; pressure: 1.5 kg/cm2G. Operating pressure of the absorption tower: 50–300 mmHG; operating temperature: 80/110. I am using NRTL equations; I’m not sure how to choose the binary interaction parameters. I think this is the challenge in performing such simulations. If any experts can offer guidance, it would be great. Using this example as a starting point, I hope that not only I but also all those who are eager to learn can benefit from it. Thank you!