Abstract In the present work, the potential of polyPOSS-imide membranes designed for the purification of H2 from a coke gas (utilized in the steelmaking industry) is investigated. Aiming at upscaling the membrane fabrication, tubular single-channel and multi-channel membranes were prepared, using polyhedral oligomeric silsesquioxane (POSS) nanostructures and 6FDA as reactive precursors. The gas separation performance has been investigated by means of single gas and quaternary (H2, CH4, CO2, N2) mixtures, the latter used to simulate the conditions expected at the membrane module inlet in the process of upgrading H2 from a coke oven gas. Preliminary results obtained on tubular membranes showed that the fabricated membranes can achieve high H2 permeance (>2000 GPU), displaying also suitable selectivity towards CO2, N2 and CH4. The selectivity of these upscaled tubular membrane samples meets the performance of those previously obtained for the disc-shaped lab-scale membranes. These results revealed the promising potential in the upscaling of polyPOSS-imide membranes fabricated via interfacial polymerization on ceramic porous supports for H2 upgrading.

中文翻译：

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用于高温 H2 升级的升级聚 POSS-酰亚胺膜

摘要 在目前的工作中，研究了设计用于从焦炭气（用于炼钢工业）中纯化 H2 的聚 POSS-酰亚胺膜的潜力。为了提高膜的制造规模，使用多面体低聚倍半硅氧烷 (POSS) 纳米结构和 6FDA 作为反应前体，制备了管状单通道和多通道膜。气体分离性能已通过单一气体和四元（H2、CH4、CO2、N2）混合物进行研究，后者用于模拟从焦炉气中提纯 H2 过程中膜组件入口处的预期条件。在管式膜上获得的初步结果表明，制造的膜可以实现高 H2 渗透率 (>2000 GPU)，对 CO2、N2 和 CH4 也显示出合适的选择性。这些放大的管状膜样品的选择性满足了先前为圆盘形实验室规模膜获得的性能。这些结果揭示了通过界面聚合在陶瓷多孔载体上制备的聚POSS-酰亚胺膜的升级潜力，用于H2 升级。