Study on Static and Dynamic Structure and Fluctuation of Supercritical Fluids

超临界流体的静动态结构及脉动研究

• 批准号: 10440167
• 负责人: NISHIKAWA Keiko
• 金额: $ 8.58万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10440167/
• 关键词: supercritical fluids; supercritical water; fluctuation; small-angle X-ray scattering; thermal conductivity; dynamic light scattering; Raman scattering; far infrared absorption; 相関距離; 光散乱; 尾根線

Being interested in the inhomogeneity of molecular distribution in supercritical fluids, the present author had obtained density fluctuations and correlation lengths. We had shown the following results; a) the density fluctuation is the most fundamental quantity, b) there exists a ridge when the contour maps of density fluctuation are drawn, c) the rate of solubility becomes maximum on the ridge, and d) the singularities in chemical reactions are observed on the ridge.Based on these konwledge, we set up the following purposes and obtained the result mentioned below.1)The university of the behavior of density fluctuation in the ρ-T phase diagram were proved for supercritical COィイD22ィエD2 and CFィイD23ィエD2H.2)The structure of supercritical water from the viewpoint of fluctuation.3)The development of an apparatus for thermal conductivity of supercritical fluids and application to supercritical COィイD22ィエD2 and CFィイD23ィエD2H.4)The determination of relaxation behavior for supercritical C2H4 by dynamic light scattering muasurements.5)The Raman scattering measurement of supercritical COィイD22ィエD2.6)The measurements of far infrared absorption spectra for supercritical CFィイD23ィエD2H.

作者对超临界流体中分子分布的不均匀性感兴趣，得到了密度涨落和相关长度：a）密度涨落是最基本的量，b）当轮廓存在脊时。绘制密度波动图，c）在脊上溶解度达到最大，d）在脊上观察化学反应的奇点。基于这些知识，我们设定了以下目的并获得了结果如下。1)超临界COD22D2和CF2D2H证明了ρ-T相图中密度波动行为的大学。2)从波动角度研究超临界水的结构。3)开发了一种装置超临界流体的热导率及其在超临界CO22D2和CF23D2H中的应用。4)弛豫行为的测定超临界C2H4动态光散射测量。5)超临界COD22D2的拉曼散射测量。6)超临界CFD23D2H的远红外吸收光谱测量。

项目成果

Y.Kasahara and K.Nishikawa: "Construction of Small-angle X-ray Scattering Diffractometer by Use of Asymmetric-Cut Monochromator"Jpn.J.Appl.Phys.. 39. 343-344 (2000)

Y.Kasahara 和 K.Nishikawa：“利用非对称切割单色仪构建小角度 X 射线散射衍射仪”Jpn.J.Appl.Phys.. 39. 343-344 (2000)

Z. Chen, K. Tozaki & K. Nishikawa: "Evaluation and Countermesures of Convective Heat Transfer on Thermal Conductivity"Japanese Journal of Applied Physics. 38. 6840-6845 (1999)

Z. Chen, K. Tozaki

Z.Chen,K.Tozaki,& K.Nishikawa: "Evaluation and Coutermeasures of Convective Heat Transfer on Thermal Conductivity"Japanese Journal of Applied Physics. 38. 6840-6845 (1999)

Z.Chen,K.Tozaki,

Z.Chen, K.Tozai and K.Nishikawa: "Development of Thermal Coductivity Measurement for Fluids which is Convinient and Effective for Samples near the Critical Point."Jpn.J.Appl.Phy.. 38. L91-L94 (1999)

Z.Chen、K.Tozai 和 K.Nishikawa：“流体热导率测量的开发，对于临界点附近的样品来说是方便且有效的。”Jpn.J.Appl.Phy.. 38. L91-L94 (1999)

Z. Chen, K. Tozaki & K. Nishikawa: "Devetopment of Thermal Conductivity Measurement for fluids Which is Convinient and Effective for Samples near Criticap Point"Japanese Journal of Applied Physics. 38. 91-94 (1999)

Z. Chen, K. Tozaki