Hi ;
While installing a Butanizer After the ethanizer in HYSYS i didn't find the adequate spec to release most of butane without loosing propane in overhead product.
I tried propane fraction of 0.05 in condenser and 5e-3 butane in reboiler but the column don't want to converge.
The feed stream is composed of :
i-Butane 0,1357
n-Butane 0,2534
i-Pentane 0,122
n-Pentane 0,1094
n-hexane 8,073e-002
Propane 0,297
feed stream conditions :
Vapour / Phase Fraction 0,61989
Temperature [C] 67,02
Pressure [bar_g] 5,93675
Molar Flow [kgmole/h] 18,70955
Column conditions :
operating Pressure 689 kPa
Number of trays 25
Thanks