As refineries pivot to process opportunity crudes (high TAN, high sulfur, high residue), the standard equilibrium model breaks. Only the rigorous "Unit Operation" approach—sequential, pressure-driven, and rate-based—holds up.
If you fail this step, your "Unit O" will predict sulfur levels of 10 ppm, but the real unit will produce 500 ppm gasoline. The simulation becomes a liability, not a tool. EHY2102 goes beyond mass balance; it introduces rate-based distillation . This is where the "Petroleum Refining" nature of the course shines. EHY2102 Aspen HYSYS Petroleum Refining...Unit O...
Always solve thermal units before pressure units, but solve reaction units last. As refineries pivot to process opportunity crudes (high