Hydrodynamics of Ceramic Sponges in Countercurrent Flow
Hydrodynamics of Ceramic Sponges in Countercurrent Flow
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DOI：
10.1021/ie101514w
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发表时间：
2011-03
影响因子：
4.2
通讯作者：
J. Grosse;M. Kind
中科院分区：
文献类型：
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作者：
J. Grosse;M. Kind
一个广泛的陶瓷海绵类型的孔隙率，孔径和材料进行了实验研究，以确定液体滞留以及湿压降和操作限制。所观察到的持液率值高于最先进的无规填料和规整填料。在相对较低的气体负荷下发生溢流，但通过使用具有锥形底部的海绵作为排水增强剂，可以显著扩大操作范围。特别是对于静态持液量，可以显示出堆叠的影响。可能的应用是例如反应精馏，其中连续固体和陶瓷材料作为催化剂载体是有利的。实验值与传统塔内构件的文献中建立的相关性进行了比较。一般来说，这些能够描述海绵结构的行为，尽管偏差比其他塔内构件观察到的大。
A broad range of ceramic sponge types regarding porosity, pore size, and material was investigated experimentally in order to determine liquid holdup as well as wet pressure drop and operation limits. The observed values for the holdup are higher than those for state-of-the-art random and structured packings. The onset of flooding occurs at relatively low gas loads, but the operation range can be significantly enlarged by using a sponge with a cone-shaped bottom as drainage enhancer. Effects of stacking can be shown especially for the static liquid holdup. Possible applications are, for example, reactive rectification, where the continuous solid and the ceramic material as catalyst carrier are of advantage. The experimental values are compared with established correlations from the literature for conventional column internals. In general, those are able to describe the behavior of sponge structures, although the deviations are bigger than observed for other column internals.