Pure Hydrogen and Methane Permeation in Carbon-Based Nanoporous Membranes: Adsorption Isotherms and Permeation Experiments.

IF 3.3 4区工程技术 Q2 CHEMISTRY, PHYSICAL

Membranes Pub Date : 2024-05-26 DOI:10.3390/membranes14060123

Matthis Kurth, Mudassar Javed, Thomas Schliermann, Georg Brösigke, Susanne Kämnitz, Suresh K Bhatia, Jens-Uwe Repke

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Abstract

This paper presents the results of adsorption and permeation experiments of hydrogen and methane at elevated temperatures on a carbon-based nanoporous membrane material provided by Fraunhofer IKTS. The adsorption of pure components was measured between 90 °C and 120°C and pressures up to 45 bar. The Langmuir adsorption isotherm shows the best fit for all data points. Compared to available adsorption isotherms of H₂ and CH₄ on carbon, the adsorption on the investigated nanoporous carbon structures is significantly lower. Single-component permeation experiments were conducted on membranes at temperatures up to 220 °C. After combining the experimental results with a Maxwell-Stefan surface diffusion model, Maxwell-Stefan surface diffusion coefficients Dis were calculated. The calculated values are in line with an empirical model and thus can be used in future multi-component modeling approaches in order to better analyze and design a membrane system. The published adsorption data fill a gap in the available adsorption data for CH₄ and H₂.

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纯氢和甲烷在碳基纳米多孔膜中的渗透：吸附等温线和渗透实验。

本文介绍了弗劳恩霍夫 IKTS 公司提供的碳基纳米多孔膜材料在高温条件下对氢气和甲烷的吸附和渗透实验结果。纯组分的吸附实验在 90°C 至 120°C 和高达 45 巴的压力下进行。朗缪尔吸附等温线对所有数据点的拟合效果最佳。与现有的 H2 和 CH4 在碳上的吸附等温线相比，所研究的纳米多孔碳结构的吸附量明显较低。在温度高达 220 °C 的膜上进行了单组分渗透实验。将实验结果与麦克斯韦-斯特凡表面扩散模型相结合后，计算出了麦克斯韦-斯特凡表面扩散系数 Dis。计算值符合经验模型，因此可用于未来的多组分建模方法，以便更好地分析和设计膜系统。已公布的吸附数据填补了现有 CH4 和 H2 吸附数据的空白。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Membranes Chemical Engineering-Filtration and Separation

CiteScore

6.10

自引率

16.70%

发文量

1071

审稿时长

11 weeks

期刊介绍： Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.