Developing continuous synthesis reactor for titanium dioxide fine particles prepared by alkoxide method using slug flow
| Project/Area Number |
05555204
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
反応・分離工学
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| Research Institution | Tohoku University |
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Principal Investigator |
TADAKI Teiriki Tohoku University, Faculty of Engineering, Professor, 工学部, 教授 (20005226)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Chiharu Tohoku University, Faculty of Engineering, Research Associate, 工学部, 助手 (00250712)
YONEMOTO Toshikuni Tohoku University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40125688)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1993: ¥6,800,000 (Direct Cost: ¥6,800,000)
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| Keywords | Titanium dioxide / Alkoxide / Slug flow / Monodispersed / Size distribution / Aggregation growth / Continuous synthesis |
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| Research Abstract |
A Novel continuous reactor system for synthesis of monodispersed titanium dioxide fine particles by means of alkoxide method were developed. A packed bed for nucleation of solid is connected in series with a slug flow aging tube unit in the reactor system. Suspension flowing in the aging tube is split into small lumps in the aging tube by injection of nitrogen gas into it intermittently. Particles prepared by this method have narrower size distribution than those with laminar flow aging tube. The effect of the aging tube diameter on characteristics of prepared particles was studied to elucidate possibility of scale up of the reactor system. Particle growth mechanism was also simulated by using aggregation growth model in which following assumption was set up ; there is no monomer-addition and particles grow solely by binary aggregation between nuclear and nuclear, nuclear and particle, or particle and particle.
The degree of particle size dispersion with slug flow aging tube was somewhat broader than that by batchwise reactor. The mixing between adjacent slug in the aging tube is considered to be responsible for that. Particles obtained with 2mm i.d. and 3mm i.d. aging tubes have nearly same characteristics so that the magnitude of liquid mixing is almost same in the two different diameter aging tube.
Not only mean particle size of particles but also geometrical standard deviation and particle number density were simulated with the aggregation growth model.
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Report
(3 results)
Research Products
(4 results)
