乙苯催化脱氢制苯乙烯生产过程的机理建模及优化

First principle modeling and optimization for dehydrogenation of ethylbenzene to styrene

中文关键词  乙苯脱氢  机理模型  在线优化  选择性  转化率

英文关键词  dehydrogenation of ethylbenzene  first principle modeling  online optimization  conversion  selectivity

中文摘要

      为针对乙苯脱氢过程实施先进控制及优化技术, 基于反应动力学、物料衡算、能量守恒原理及Ergun方程, 通过求解微分方程组建立乙苯脱氢绝热负压径向反应器的机理模型, 可有效预测未来系统的生产状况. 在所建立的机理模型基础上, 根据实际生产状况建立了所需的约束条件及优化条件, 利用工程应用较多的多变量复合形约束算法实现了过程生产的在线优化. 通过改变各个操作条件明确了它们对脱氢生产的影响规律, 为后续先进控制与优化项目的实施奠定了基础.

英文摘要

      By the principles of kinetics and conservation of energy, we solve the related differential equations and develop a first principle model for the dehydrogenation of ethylbenzene to styrene in an adiabatic radial flow reactor. This model can be used to predict the features of the dehydrogenation system. The constraints to the practical process are formulated for simulating and online optimizing the dehydrogenation of ethylbenzene using a constraint multivariable complex algorithm. Simulation results show that the obtained model can reveal the reactions in operation, and thus it is applicable to the implementation of advanced control and optimization.