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Particle Responses to Flow Field Oscillations in Heterogeneous Polymerizations Performed in Tank Reactors
Author(s) -
Poubel Willian M.,
Silva Carlos E. F. C.,
Souza Evandro N.,
Pinto José Carlos
Publication year - 2014
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201300142
Subject(s) - particle (ecology) , continuous stirred tank reactor , polymerization , work (physics) , mass transfer , kinetic energy , mechanics , flow (mathematics) , heat transfer , materials science , polymer , thermodynamics , chemical physics , chemistry , physics , classical mechanics , oceanography , composite material , geology
This work analyzes the possible influence of the inevitable temperature and concentration fluctuations that take place inside typical stirred tank heterogeneous polymerization reactors on the evolution of kinetic variables. Preliminary analyses regarding the characteristic time constants for heat and mass transfer inside polymer particles that are suspended in a continuous phase are performed in order to evaluate how fast particles respond to perturbations along a dynamic trajectory inside the reactor. It is concluded that particles of typical heterogeneous systems can respond almost immediately to operation changes. For this reason, simulations are performed to evaluate the influence of the varying temperature and concentration fields on the evolution of kinetic variables. It is concluded that the effects caused by the inevitable fluctuations of temperature and concentration inside the vessel can be neglected in usual conditions of reaction of heterogeneous polymerization systems.