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|Type:||Artigo de evento|
|Title:||Evaluation Of Genetic Algorithm Coding To Optimization Of A Large Scale Systems|
Maciel Filho R.
|Abstract:||The study case is a large scale hydrogenation multiphase catalytic reactor to obtain a cyclic alcohol (CA).The system is analyzed for different level of operational requirements. The reactor consists of concentrical tubes, with the reactants flowing through the internal tubular part, while the coolant circulates through the inner annules. The mathematical equations of the deterministic model are based on conservation principles (mass, energy and momentum) for the reactants and for the coolant and validated with real operational data. The model is written in steady-state regimen with the plug-flow assumption. The main task is to develop and implement a GA code coupled in this reactor mathematical model, considering the analysis and comparison among two coding types inherent the Genetic Algorithms (binary and floating-point coding), in the optimization of reactor operational parameters. This analysis considers the use of specific genetic parameters of each coding type, and the respective influences in the reaction performance (cyclic alcohol productivity increase). The choice of an appropriate structure (representation or coding) for solutions (individuals) of a determined problem is a major determining factor to GAs success. The intention is to show that this technique is suitable for cyclic alcohol production maximization obtaining good results with operational improvements (reduction catalyst rate, reduction main reactant rate - benzylic alcohol and undesired product rate - cycloalkane), analyzing two coding types and the influence that these have in the reactor performance (cyclic alcohol productivity increase). The reduction main reactant rate must be considered, mainly when the emissions occur in high concentrations causing damages to the environment. The results shown that, the method is very robust procedure which allows the reactor to be operated of high level of performance, restricting the emissions of toxic reactant and reducing the undesirable products.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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