Abstract In this work, we show the application of a systematic general experimental analysis to estimate in a relatively easy way the paired effects of concentration polarization and inhibition in the hydrogen permeation through diverse supported Pd-based membranes as functions of temperature and mixture composition. For this purpose, three different membranes are fabricated and tested under pure‑hydrogen and binary-mixture of H2-N2 and H2-CO. The former mixture is used to quantify the concentration polarization influence only, whereas the latter is used to quantify the overall combined effect of polarization and inhibition. Manipulating the two effects, we finally obtain the influence of inhibition only. As main results, a maximum overall permeation reduction of around 35%, 55% and 45% is evaluated for Mem#1, for Mem#2, for Mem#3, respectively. Moreover, a maximum concentration polarization coefficient of around 2.5%, 19% and 12% and a maximum inhibition coefficient of 32%, 45% and 40% are respectively evaluated. These values state the importance of having a tool able to take into account these detrimental phenomena in designing ultra-thin-membrane equipment, remarking that the same approach can be applied to other types of metal membranes as well.

中文翻译：

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用于氢气纯化的 Pd 基膜中浓差极化和抑制的系统实验评估

摘要 在这项工作中，我们展示了系统的一般实验分析的应用，以相对简单的方式估计浓差极化和抑制氢渗透通过不同负载的 Pd 基膜的配对效应，作为温度和混合物组成的函数。为此，在纯氢和 H2-N2 和 H2-CO 的二元混合物下制造和测试了三种不同的膜。前一种混合物仅用于量化浓差极化影响，而后者用于量化极化和抑制的整体组合效应。操纵这两种效应，我们最终只得到抑制的影响。作为主要结果，对 Mem#1、Mem#2 和 Mem#3 的最大整体渗透降低分别评估为约 35%、55% 和 45%。此外，分别评估了约 2.5%、19% 和 12% 的最大浓差极化系数和 32%、45% 和 40% 的最大抑制系数。这些值说明了在设计超薄膜设备时拥有能够考虑这些有害现象的工具的重要性，并指出相同的方法也可以应用于其他类型的金属膜。