Persons at STU
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Basic information about a final thesisAdditional informationAdditional information about the final thesis follows. Click on the language link to display the information in the desired language.
|Language of final thesis:||English|
Parts of thesis with postponed release:
|Title of the thesis:||Modeling, Optimization and Safety Analysis of Different Types of Chemical Equipments.|
|Summary:||Chemical reactors with exothermic reactions represent the most dangerous operational units in chemical industry. The aim of the presented thesis is the development of a mathematical model of different types of reactors (reactive distillation columns, hybrid reactive separation processes) with exothermic chemical reactions and application of the model in design, simulation, optimization and safety analysis of such units. The design and safety analysis of the reactors (reactive distillation columns, hybrid reactive separation processes) requires detailed knowledge of the reaction kinetics and equilibrium of all reactions, vapor--liquid equilibrium, vapor--liquid mass transfer and, in case of heterogeneous catalysis, also knowledge of transport phenomena in the catalyst particle. For this reason, the role of model complexity in the safety analysis has to be discussed. A safety analysis includes an analysis of steady state multiplicity and their stability, study of safe operating conditions, investigation of conditions and trajectories which can shift the reactor (reactive distillation columns, hybrid reactive separation processes) from one steady state to another one and determination of a safe start-up and shut-down procedure. The presented work can be divided into three main parts. The first part is focused on a model based HAZOP study of different types of chemical equipments. In this part, the methodology of hazard investigation and safety analysis of different types of chemical equipments are presented. The present methodology of hazard investigation is based on the integration of a mathematical model approach into the Hazard and Operability (HAZOP) analysis -- model based HAZOP study. The second part is focused on the modeling, design and safety analysis of a reactive distillation column. In this part of the work, modeling and safety analysis of a reactive distillation column were done and the quality of the used mathematical models and the influence of the model parameters on the prediction of a reactive distillation column steady state and dynamic behavior are discussed. The third part is focused on steady state and dynamic simulations of hybrid reactive separation processes. The first type of investigated hybrid system was the pervaporation reactor for esterification. The second type of investigated hybrid reactive-separation system consists of a reactive distillation column and a pervaporation membrane located in the distillate stream to remove water from the process. The third type of the combined hybrid process consists of a reactive distillation column, pervaporation membrane unit and an additional distillation column.|
|Key words:||HAZOP, hybrid reactive separation processes, mathematical modeling, membrane separation, multiple steady states, safety analysis|
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