Modeling the extra-column volume in a small column setup for bulk gas adsorption
Modeling the extra-column volume in a small column setup for bulk gas adsorption
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DOI：
10.1007/s10450-012-9417-z
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发表时间：
2012-09
期刊：
影响因子：
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通讯作者：
L. Joss;M. Mazzotti
中科院分区：
文献类型：
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作者：
L. Joss;M. Mazzotti
本研究旨在强调准确表征柱外体积 (ECV) 的重要性，并根据在 1 bar、5 bar 和 10 bar 的各种流速和压力下进行的阶跃响应实验，提出基于柱外体积表征的实验和计算协议。通过用隔室模型描述柱外体积来解释实验，该模型反映了物理设置的几何形状，并且涉及停滞区以解释通过管道系统的非理想流动行为。使用结合吸附塔和 ECV 描述的数学模型可以成功预测在活性炭吸附剂上不同压力下进行的实验 CO2-H2 突破曲线。这项工作展示了如何考虑不可忽略的柱外效应的存在，以确定吸附传输参数。
This study aims at highlighting the importance of an accurate characterization of the extra-column volume (ECV) and presents an experimental and computational protocol based on the characterization of the extra-column volume in terms of step-response experiments performed under various flow rates and pressures of 1 bar, 5 bar and 10 bar. The experiments are interpreted by describing the extra-column volume with a compartment model that reflects the geometry of the physical setup and that involves a stagnant zone to account for the non-ideal flow behavior through the piping system. The use of a mathematical model combining the description of the adsorption column and of the ECV can successfully predict experimental CO2–H2breakthrough profiles performed at different pressures on an activated carbon adsorbent. This work shows how the presence of non-negligible extra-column effects can be accounted for, for the determination of adsorption transport parameters.