Abstract: The optimal control system developed by Beijing optimipro control technology Co. Ltd. was used in reforming unit of Qingdao Petrochemicals. The operation of the control system was safe, stable and no abnormal situations. The use of this software ensured that the process constraint conditions were set within the scope of operation. By optimizing the inlet temperatures of four reactors, the octane number yield (the product of multiplying liquid yield by RON) and the economic benefit can be maximized. The octane yield of C5+ stabilized gasoline enhances 0.65 percentage point higher than the blank reference and the economic benefit increases nearly ￥19.63/t.

Key words: optimization, reforming, octane number yield, benefit