Matrimid®/LaNi5 mixed matrix membranes for selective hydrogen separation from industrial waste gas streams

IF 8.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2025-02-01 DOI:10.1016/j.memsci.2024.123591

Gonzalo Moral, Alfredo Ortiz, Daniel Gorri, Inmaculada Ortiz

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Abstract

This study reports the synthesis, characterization, and evaluation of Matrimid®/LaNi₅ mixed matrix membranes for selective hydrogen separation from industrial waste gas streams. Through a combination of experimental investigation and modelling, hydrogen absorption in LaNi₅ intermetallic compounds and its impact on separation performance were explored. It was observed that the composite membranes exhibit significant enhancement in hydrogen permeation compared to pristine Matrimid® membranes. The results showed that Matrimid®/LaNi₅ membranes deliver 5 times higher H₂ permeability (107 Barrer) and higher selectivity (H₂/CO₂: 14.5, H₂/N₂: 83.5, H₂/CH₄: 78.5 and H₂/CO: 84.5). Furthermore, hydrogen permeation flux modelling in Matrimid®/LaNi₅ elucidated the contribution of each transport mechanism with high regression coefficients (>0.92) and within ±15 % error. Moreover, the results demonstrate the capability of Matrimid®/LaNi₅ membranes to surpass Robeson upper bound for H₂/CO₂ while it is almost reached for H₂/N₂ and H₂/CH₄ separations, highlighting the potential of these new membranes for industrial-scale applications.

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来源期刊

Journal of Membrane Science 工程技术-高分子科学

CiteScore

17.10

自引率

17.90%

发文量

1031

审稿时长

2.5 months

期刊介绍： The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.