[engineer012345]

Hi,
 
I am designing a demethanizer column (MTO process) on HYSYS for a project. What are some of the considerations that I need to take into account? I have never simulated a cryogenic process on HYSYS and I am wondering how to go about it. I have a rough idea of the pressure of the distillation column based on literature readings. However, I am unsure about the thumb of rule for cryogenic simulations on HYSYS (turboexpander, reboiler duty, condenser duty, etc).
 
Any pointers on how to go about this will be appreciated. Thank you for your help in advance!