Model predictive control for hydrogen production system of pyrolytic gas production

In order to solve the problem of low thermodynamic efficiency of traditional steam-enhanced reforming reaction systems, this paper uses Aspen Plus
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software for chemical process simulation to build a complete process for hydrogen production from pyrolysis gas. It conducts detailed modeling of gas purification, enhanced reforming, calcination and regeneration, dehydration and drying, pressure swing adsorption(PSA) and other units. The model predictive control(MPC) is designed according to the optimal parameter ratio. The simulation results show that compared with the traditional proportion integration differentiation(PID) control, under the same feed condition, the response time of the MPC controller is reduced by 390s and 186s, respectively, under the step response and slope response tracking curves. The MPC controller’s IAE(Integral Absolute Error) value is minor, and the control effect is better than the PID controller. The enhanced reforming hydrogen production system of pyrolysis gas combined with MPC control can realize the stable operation of the system and higher energy efficiency. It can be used as one of the ways to produce hydrogen from gas at present and has specific practical application value.