Abstract X-ray tomography is a powerful method for the noninvasive investigation of fluid dynamics in packed columns. However, for the quantitative determination of local fluid dynamic parameters, such as film thickness on packing sheets, the spatial resolution is often too low. In this work, tomographic measurements were carried out in a column of 100 mm diameter equipped with Mellapak 350.Y packings. Different working liquids with low surface tension and varying viscosity up to 50 mPa s were used. Methods for improving the representation of the dry structured packing sheets and the gas–liquid interface in the cross-sectional images are presented. They are applied to the tomographic images and allow overcoming image resolution restrictions, which results in accurate determination of film thickness and degree of wetting on the structured packing.

中文翻译：

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通过 X 射线断层扫描确定规整填料中的局部流体动力学参数：克服图像分辨率限制

摘要 X 射线断层扫描是一种对填充柱中的流体动力学进行无创研究的有效方法。然而，对于局部流体动力学参数的定量测定，例如包装片上的薄膜厚度，空间分辨率通常太低。在这项工作中，断层扫描测量是在一个装有 Mellapak 350.Y 填料的直径为 100 毫米的色谱柱中进行的。使用了具有低表面张力和高达 50 mPa s 的不同粘度的不同工作液体。介绍了改进干式规整填料片材和横截面图像中气液界面表示的方法。它们被应用于断层图像并允许克服图像分辨率限制，从而准确确定膜厚度和规整填料上的润湿程度。