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Modeling, simulation and optimization are the keys to process systems engineering. In the thesis, the steady state simulation and optimization of PTA oxidation process are studied. The main contributions can be summarized as follows:1) Parameters estimation is essatial for modeling of an industrial process. However the traditional parameters estimation methods offen reflect poor convergence for a complex model. A sequential parameter estimation method is processed to deal with process with multi-scenarios. It is successfully applied in modeling of the core PTA oxidation process, include in the oxidation reactor, four condensers, the first crystallization, etc.2) The whole PTA oxidation process, including the oxidation reactor, four condensers, the first crystallization, high-pressure absorption tower, atmospheric absorption tower, solvent dehydration tower systems, has been simulated and modeled.3) Based on COM technology, software is developed for realtime detection of the PX and acetic acid consumption in PTA process. It has benn successfully implemented online monitor and optimization the PX and acetic acid consumptions.
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