Optimization of Taylor Dispersion Technique for Measurement of Mutual Diffusion in Benchmark Mixtures

详细信息    查看全文

• 作者：C. I. A. V. Santos ; V. Shevtsova ; H. D. Burrows…
• 刊名：Microgravity Science and Technology
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：28
• 期：4
• 页码：459-465
• 全文大小：247 KB
• 刊物类别：Engineering
• 刊物主题：Extraterrestrial Physics and Space Sciences
  Aerospace Technology and Astronautics
  Classical Continuum Physics
  
• 出版者：Springer Netherlands
• ISSN：1875-0494
• 卷排序：28

文摘

The Taylor dispersion technique has been used for measuring binary mutual diffusion coefficients for mixtures of 1,2,3,4-tetrahydronaphthalene (THN), isobutylbenzene (IBB) and dodecane (C₁₂H₂₆) at 0.5:0.5 mass fraction symmetric points, and for 0.9:0.1 mass fraction in IBB- C₁₂H₂₆. From the Stokes–Einstein equation and our experimental results, the limiting diffusion coefficients, D0, and the equivalent solvated radii, R_s, have been estimated at infinitesimal concentration of these species (TNH, IBB and C₁₂H₂₆). The measured diffusion coefficients are used to estimate activity coefficients of the components in the mixture, contributing to a better understanding of the structure of such systems and of their thermodynamic behaviour at different concentrations. We have also investigated the diffusion properties for a ternary system containing equal mass fractions of all the components (0.33THN: 0.33IBB: 0.33C₁₂H₂₆) and at 298.15 K.KeywordsDiffusion1,2,3,4-tetrahydronaphthalene (THN)Isobutylbenzene (IBB)Dodecane (C₁₂H₂₆)Taylor technique