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    New inorganic membranes for gas separations which are stated above the Robeson’s trade-off upper bound
    (Elsevier, 2023) Pallavi, K.C.; Isloor, A.M.; Mohammad, A.W.
    Gas isolation and separation methods are very precious among the operations in the industry related to oil and gas. Conventional methods involve huge extent of energy and less performance. Inorganic membranes possess excellent chemical, thermal, and mechanical stability compared to any other conventional counterparts. Very fast and attractive progresses have been found regarding inorganic membrane material modeling and development, fabrication method, control over microstructure, and optimization. Various zeolite, silica, and carbon-derived membranes are found effective in gas separations such as natural gas isolation, helium extraction, carbon dioxide capture, hydrocarbon separations, and many more. Because of the good stability, high separation performance, nonvolatility, and designable properties of the inorganic membranes, they have been rendered as novel potential candidates and alternative media for gas separation. This content enables to find out the new developments happened in the domain of inorganic membranes utilized in gas separation which stay above the Robeson’s boundary. © 2024 Elsevier Inc. All rights reserved.
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    Nonporous polymeric membranes for biohydrogen purification
    (Elsevier, 2025) Mendonca, N.R.; Isloor, A.M.; A.F., A.F.
    Biohydrogen generated from biomass is a clean form of hydrogen. The dark fermentation process for the generation of biohydrogen gives a mixture of H2 and CO2 from which biohydrogen needs to be purified. From the available methods for biohydrogen purification, membrane technology is the most viable since it is less energy-intensive and can be combined easily with other processes. Both polymeric as well as inorganic membranes are employed in gas separation processes. Of these, nonporous polymeric membranes are economically viable and are hence used in large-scale gas separations. The use of nonporous polymeric membranes, composed of polymers like polybenzimidazole, polyimide, and polysulfone, for biohydrogen purification is an ongoing area of research which can help to generate hydrogen for use in hydrogen fuel cells, hence reducing the dependence on fossil fuels which pollute the environment. © 2026 Elsevier Inc. All rights reserved.