Potential of Polymer Membranes for Xenon Recovery from Medical Waste Gas Mixtures

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2023-04-19 DOI:10.1134/S2517751623020087

V. V. Zhmakin, S. Yu. Markova, V. V. Teplyakov, M. G. Shalygin

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Abstract

This work is devoted to the evaluation of xenon permeability coefficients for a wide range of polymeric membrane materials, as well as the primary experimental verification of the calculation results for materials used in the production of gas separation membranes. The solution of the problem of O₂/Xe mixture separation as a base for xenon-containing waste medical gas mixtures where it is possible to recover xenon for its reuse has been emphasized. The xenon permeability coefficients have been evaluated using a correlation approach that relates the molecular properties of a gas to gas permeability, and available literature data on the permeability of other gases. The results obtained make it possible to distinguish two main groups of membrane polymers in the Robeson diagram for O₂/Xe gas pair: xenon-selective (polysiloxane-based rubbers and highly permeable functional polyacetylenes) and oxygen-selective (polyimides, PIMs, perfluorinated polymers). Industrial composite membrane MDK with a selective layer of silicone copolymer and laboratory composite membranes based on PSf and PVTMS have been experimentally investigated. The obtained data demonstrate satisfactory convergence of the experimental values with the estimated ones. Based on the results obtained, MDK membrane can be recommended as xenon-selective for xenon recovery (α(Xe/O₂) = 3.1).

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聚合物膜回收医疗废气混合物中氙的潜力

这项工作致力于对各种聚合物膜材料的氙渗透系数进行评估，并对用于生产气体分离膜的材料的计算结果进行初步实验验证。强调了解决O2/Xe混合物分离问题，作为含氙的医疗废气混合物的基础，其中有可能回收氙进行再利用。氙渗透系数的评估采用了一种将气体分子特性与气体渗透性联系起来的相关方法，以及其他气体渗透性的现有文献数据。所获得的结果使得在O2/Xe气体对的Robeson图中区分两组主要的膜聚合物成为可能:氙选择性(聚硅氧烷基橡胶和高渗透性功能聚乙炔)和氧选择性(聚酰亚胺、pim、全氟聚合物)。实验研究了含硅树脂共聚物选择性层的工业复合膜MDK和基于PSf和PVTMS的实验室复合膜。所得数据表明，实验值与估计值有较好的收敛性。根据所得结果，可以推荐MDK膜作为氙选择性膜进行氙回收(α(Xe/O2) = 3.1)。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.