101.Application of neutron radiography to flow visualization in supercritical water
101.Application of neutron radiography to flow visualization in supercritical water
复制标题
101.中子射线照相在超临界水中流动可视化的应用
DOI：
10.1016/j.phpro.2013.03.030
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Y. Saito
中科院分区：
文献类型：
--
作者：
N. Takenaka;K. Sugimoto;S. Takami;K. Sugioka;T. Tsukada;T. Adschiri;Y. Saito
超临界水用于各种化学反应过程，包括金属氧化物纳米颗粒的水热合成、氧化、生物质和塑料的化学转化。超临界水的密度远小于亚临界水的密度。通过使用中子射线照相术，Peterson等人研究了超临界水中的盐沉淀过程和用于盐沉淀的逆流容器中的流动模式，Balasko等人揭示了容器中超临界水的行为。采用超临界流体与亚临界水溶液混合的方法制备纳米颗粒。在本研究中，中子射线照相技术被应用到超和亚临界水混合物的流动显示的T形接头制成的不锈钢管的高压和高温条件下，调查他们的混合过程。利用KUR B4口的中子照相系统，用CCD摄像机拍摄了静态图像。
Supercritical water is used in various chemical reaction processes including hydrothermal synthesis of metal oxide nano-particles, oxidation, chemical conversion of biomass and plastics. Density of the super critical water is much less than that of the sub-critical water. By using neutron radiography, Peterson et al. have studied salt precipitation processes in supercritical water and the flow pattern in a reverse-flow vessel for salt precipitation, and Balasko et al. have revealed the behaviour of supercritical water in a container. The nano-particles were made by mixing the super critical flow and the sub critical water solution. In the present study, neutron radiography was applied to the flow visualization of the super and sub critical water mixture in a T-junction made of stainless steel pipes for high pressure and temperature conditions to investigate their mixing process. Still images by a CCD camera were obtained by using the neutron radiography system at B4 port in KUR.