Abstract This work presents a critical analysis of 2D model of refueling a hydrogen storage tank containing MOF-5 adsorbent under cryogenic and room temperature conditions. Three isotherm models, viz. Unilan, modified Dubinin–Astakhov DA and Toth, were fitted with experimental data of hydrogen adsorption from the literature, and their effect on refueling of adsorbent bed is analyzed. The choice of isotherm has the greatest impact on predicting refueling behavior, for both flow-through and end-flow (i.e., batch) systems. A comparison between the ideal gas assumption and virial equation of state indicates that the former reasonably captures the overall behavior at lower computational cost. Analysis of the role of momentum balance, solved as full Navier–Stokes model and with Darcy’s approximation, indicates same hydrogen uptake in the adsorbent bed and only a minor difference in the predicted velocity profiles. Finally, effect of temperature-dependent physical properties of gas, adsorbent and walls is analyzed.

中文翻译：

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基于 MOF-5 的氢吸附系统换料传输模型的临界分析

摘要 这项工作提出了在低温和室温条件下为含有 MOF-5 吸附剂的储氢罐加油的二维模型的关键分析。三个等温线模型，即。Unilan、改良的 Dubinin-Astakhov DA 和 Toth 拟合了文献中氢吸附的实验数据，并分析了它们对吸附床换料的影响。等温线的选择对预测加油行为的影响最大，对于流通和端流（即批量）系统。理想气体假设与维里状态方程之间的比较表明，前者以较低的计算成本合理地捕获了整体行为。分析动量平衡的作用，作为完整的 Navier-Stokes 模型和 Darcy 近似求解，表明吸附床中的氢气吸收量相同，预测的速度曲线只有很小的差异。最后，分析了气体、吸附剂和壁的温度相关物理性质的影响。