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|Type:||Artigo de periódico|
|Title:||Modelling And Simulation Of An Industrial Slurry Reactor For Ethylene Polymerization|
|Abstract:||A dynamic model of a slurry polymerization stirred tank reactor for the production of high-density polyethylene, based on first principles only, is presented. The kinetic mechanism adopted includes initiation, propagation, first order deactivation, hydrogen transfer, ethylene transfer, transfer to cocatalyst and β-hydride elimination. Two site types are considered each one with its own kinetic constants. The Multigrain Model (MGM) approach was adopted for the solid particles, combined with a simulation strategy applying orthogonal collocation. The model also includes overall mass balance equations accounting for the mass transfer resistance between liquid and solid phases and the overall energy balance equation. The simulation procedure handles all the equations simultaneously. The model is capable of predicting the qualitative behavior of operation variables such as production rate, catalyst efficiency and temperature, and of variables associated with the polymer properties such as mean molecular weight and polydispersity index.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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