Liquid load point determination in a reactive distillation packing by x-ray tomography
Liquid load point determination in a reactive distillation packing by x-ray tomography
复制标题
通过 X 射线断层扫描确定反应蒸馏填料中的液体负载点
DOI：
10.1002/cjce.20320
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发表时间：
2010
影响因子：
2.1
通讯作者：
D. Toye
中科院分区：
文献类型：
--
作者：
Saïd Aferka;A. Viva;E. Brunazzi;P. Marchot;M. Crine;D. Toye
在本文中，我们报告了使用 X 射线断层扫描来确定 0.1 m 直径模块化催化蒸馏填料 Katapak-SP11 和 Katapak-SP12 中的液体负载点。液体负载点对应于总填充床液体负载，高于该负载时，流到催化篮外部的液体增加，并且催化篮本身被液体饱和。从断层扫描图像中，我们表明有几个因素影响催化篮的润湿和填充。催化填料复杂的混合结构影响元件内部的液体分布。液体优先填充外部催化篮，因为外部催化篮不仅接收来自位于上方的填充元件的液体，还接收来自壁擦拭器的液体。此外，催化篮部分内的液体滞留量显着取决于填料元件中的垂直位置以及塔填料床中填料的位置。逆流气流加速了篮子的液体填充过程，对于低液体负载也是如此。通过实验观察到的催化篮中液体的不均匀分布使得识别独特的液体负载点并不简单。
In this paper, we report on the use of X-ray tomography to determine the liquid load point in 0.1 m diameter modular catalytic distillation packings Katapak-SP11 and Katapak-SP12. The liquid load point corresponds to the overall packed bed liquid load above which there is an increment in the liquid flowing outside the catalytic baskets and the catalytic baskets themselves are saturated with liquid. From tomographic images, we show that several factors affect the wetting and filling of catalytic baskets. The complex hybrid structure of catalytic packings influences the liquid distribution inside the elements. The liquid preferentially fills the external catalytic baskets because they receive the liquid not only from the packing element situated above but also from the wall wipers. Moreover, liquid hold-up inside a catalytic basket section depends significantly on the vertical position in the packing element and on the position of the packing in the column packed bed. The counter-current gas flow speeds up the process of liquid filling of the baskets, also for low liquid loads. The non-uniform distribution of liquid in catalytic basket which is observed experimentally makes the identification of a unique liquid load point not straightforward.