2000 Fiscal Year Final Research Report Summary
Construction of a Concept for Emergent Synthesis of Complex Chemical Processes
| Project/Area Number |
11450292
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
化学工学一般
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| Research Institution | KOBE UNIVERSITY |
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Principal Investigator |
KATAOKA Kunio Kobe University, Dept.of Chemical Science and Engineering, Professor, 工学部, 教授 (20031081)
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| Co-Investigator(Kenkyū-buntansha) |
OHMURA Naoto Kobe University, Dept.of Chemical Science and Engineering, Associate Professor, 工学部, 助教授 (50223954)
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| Project Period (FY) |
1999 – 2000
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| Keywords | Continuous Stirred Tank Reactor / Chemical Reaction Operation / Mixing / Complex System / Instability / Chemical Oscillation / Bifurcation / Chaos |
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| Research Abstract |
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.
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