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首页> 外文期刊>Macromolecular reaction engineering >Particle Responses to Flow Field Oscillations in Heterogeneous Polymerizations Performed in Tank Reactors
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Particle Responses to Flow Field Oscillations in Heterogeneous Polymerizations Performed in Tank Reactors

机译：罐式反应器中非均相聚合中流场振荡的颗粒响应

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摘要

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.
机译：这项工作分析了典型的搅拌釜多相聚合反应器内部不可避免的温度和浓度波动对动力学变量演变的可能影响。对悬浮在连续相中的聚合物颗粒内部的传热和传质的特征时间常数进行了初步分析，以评估颗粒对反应器内部动态轨迹的扰动有多快反应。结论是典型的异构系统的粒子几乎可以立即对操作更改做出响应。因此，进行模拟以评估温度和浓度场的变化对动力学变量演变的影响。结论是，在非均相聚合体系的通常反应条件下，可以避免由于容器内温度和浓度的不可避免的波动而引起的影响。

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