Synthesis of ACS Digital Equivalent by the Ethylbenzene Dehydrogenation Process

Abstract

The article considers the main stages of evolution of the mathematical model of the physico-chemical stages of catalytic dehydrogenation of ethylbenzene during styrene production. The new structural elements of the mathematical model describing the chemical processes of heat exchange and ethylbenzene dehydrogenation are presented. The introduction of additional mathematical dependences makes it possible to reduce the number of structural and parametric uncertainties characteristic of previously known models of dehydrogenation kinetics. A system of logically interconnected models is developed as a digital equivalent of an automated process control system. The synthesis of the digital predictive control system equivalent within the model-oriented design concept framework is described. A method for synthesizing hierarchical models of chemical–technological systems is proposed. A software emulation of the automated control system of the process under study is performed. The results of computer implementation of the digital equivalent in the form of predicted trajectories of changes in the parameters of the state of the technological process, reaction medium, and catalyst are presented.