hi all,

I am studying how to use Petro-SIM software. i met a subject that make me confusing.

+ My Problem: When i build a column, there are two options to set-up: DISTOP and Tray-To-Tray.
From what i've learnt: DISTOP model is using for optimization case, Tray-To-Tray is using for Trouble shooting. and DISTOP does not run well for the system includes C5 minus.
For example: if i want to change steam flow or some heat PA, etc to get more product i wanted i will use DISTOP model to build the column. If i want to size tray, change number of tray hole, downcomer, etc.,... the tray to tray model will be used.

+ Question:
1. My understanding is correct or NOT? what is wrong?
2. Please share me how to build a Distop correctly.
3. Could you please share me any document that i can refer to learn about DISTOP and tray2tray?

Thanks in advance!
Best regards