Study on the optimization of raw material for hydrogen production unit in refinery

According to the historical data of hydrogen production unit in refinery, the cost model and the comprehensive energy consumption model of the unit are developed. Furthermore, Aspen Plus is used to develop the mathematical model of the process and the quantitative calculation of the key material consumption of the unit is realized from the perspective of reaction mechanism. Based on the developed model, the optimization analysis system of raw material for hydrogen production unit is developed by using Matlab GUI. The deviation between the simulation result and the actual operation value of the unit is less than ±10%, which meets the engineering calculation requirements. The sensitivity analysis of key parameters is carried out. The impact of different raw materials on the cost of hydrogen production is calculated and analyzed. Raw material price, the ratio of hydrogen to carbon as well as theoretical hydrogen production rate are the main factors The influence of different raw materials on the comprehensive energy consumption of the unit is calculated and analyzed. The comprehensive energy consumption is relatively low when natural gas and PSA desorption gas as raw materials and relatively high when coking dry gas and FCC dry gas as raw materials.