dear get jug, it it not a solution when removing N2, before making simulation you must prepare a good database, in a proper sheet, all data needed by the program must be put correctly, and fix your trajet, a premlemenary caculations are always needed , try other think but not modifying the composition !!!, try to encrease MEA concentration, or flow rate or the tray number, and do not touch in many variables at the same time you, try one and observe changes...

send me you problem l :lagah_omar@yahoo.fr