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Construction of a Concept for Emergent Synthesis of Complex Chemical Processes

复杂化学过程紧急合成概念的构建

基本信息

批准号：
11450292
负责人：
KATAOKA Kunio
金额：
$ 2.43万
依托单位：
KOBE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450292/
关键词：
Continuous Stirred Tank Reactor Chemical Reaction Operation Mixing Complex System Instability Chemical Oscillation Bifurcation Chaos

项目摘要

The first year purpose was to investigate the instabilities deviating from a steady state of complex chemical processes and their bifurcation of chemical oscillations. The second year purpose was to investigate the stabilization of chemical oscillations by dynamic operations. The methodology for designing a mixing field was also studied from a viewpoint of emergent synthesis.1. Effect of Mixing on Bifurcation Characteristies of Belousov-Zhabotinskii Reaction : Even under a condition when a CSTR was stirred well at very high rotation numbers, the effect of reactor volume, which should be taken into account on scale-up design, was still found on the bifurcation characteristies of chemical oscillations.2. Self-sustained Oscillation in Continuous Emulsion Polymerization of Vinyl Acetate and Effect of Dynamic Operations : Under a condition of emulsifier concentration below CMC, self-sustained oscillations of not only the monomer conversion but also the particle size distribution were observed. Those oscillations were regularized by means of dynamic operation periodically switching over the mean residence time between the two values, the one is larger and the other is smaller than the critical value.3. An emergent synthesis for designing mixing fields of very high viscosity fluid was confirmed to be possible if nonlinear dynamic data of simple flow systems are integrated with the aid of constitutive approach.

第一年的目标是研究复杂化学过程偏离定态的不稳定性及其化学振荡的分叉。第二年的目的是研究通过动态操作稳定化学振荡。从突现合成的角度研究了混合场的设计方法.混合对Belousov-Zhabotinskii反应分岔特性的影响：即使在搅拌条件下，反应器体积对化学振荡分岔特性的影响仍然存在，这在放大设计中应予以考虑.醋酸乙烯酯连续乳液聚合中的自持振荡及动态操作的影响：在低于CMC的乳化剂浓度下，不仅单体转化率发生自持振荡，而且粒径分布也发生自持振荡。这些振荡是通过动态操作定期切换的平均停留时间之间的两个值，一个是大的，另一个是小于临界值.通过对简单流动系统的非线性动力学数据与本构方法的结合，证实了高粘度流体混合场设计的突现综合是可能的。