Gas separation membranes with enhanced performance were developed by the introduction of nanosized palladium particles. In this study, gas separation performance of Matrimid membrane incorporated with palladium-zeolitic imidazolate framework-8 (Pd@ZIF-8) particles, prepared by solution casting method, has been investigated. ZIF-8 nanoparticles were first synthesized using rapid room-temperature method and Pd@ZIF-8 nanoparticles were prepared through an assembly approach. The synthesized nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffractometry (XRD), and Fourier transform infrared equipped with attenuated total reflection (FTIR-ATR). TEM images exhibited that the incorporated Pd nanoparticles are well confined within the ZIF-8 crystals. The prepared mixed matrix membranes (MMMs) with various Pd@ZIF-8 contents (0–30 wt%) were characterized by SEM and XRD. All the modified membranes exhibited enhanced gas separation performance for selected gas pairs compared to a neat Matrimid membrane. The highest performance was observed for nanocomposite membranes with incorporation of 30 wt% of Pd@ZIF-8 into Matrimid which resulted in 72% increase in H₂ permeability. The separation factors of H₂/CO₂, H₂/CH₄ and H₂/N₂ were improved from 3.25, 126.13, 95.21 for Matrimid/ZIF-8 to 5.82, 228.2 and 169.1 for Matrimid/(Pd@ZIF-8) membranes, respectively. Finally, the increase in feed pressure significantly improved the separation performance quality in all the membranes.

中文翻译：

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基于Matrimid和钯-沸石咪唑盐骨架的混合基质膜用于氢分离

通过引入纳米尺寸的钯颗粒，开发出性能增强的气体分离膜。在这项研究中，研究了通过溶液流延法制备的掺有钯-沸石咪唑酸酯骨架8（Pd @ ZIF-8）颗粒的Matrimid膜的气体分离性能。首先使用快速室温方法合成ZIF-8纳米粒子，并通过组装方法制备Pd @ ZIF-8纳米粒子。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），能量色散X射线光谱（EDX），X射线衍射仪（XRD）和配备衰减全反射的傅立叶变换红外（FTIR）对合成的纳米颗粒进行表征-ATR）。TEM图像显示掺入的Pd纳米颗粒被很好地限制在ZIF-8晶体内。用SEM和XRD对制备的具有各种Pd @ ZIF-8含量（0–30 wt％）的混合基质膜（MMM）进行表征。与纯净的Matrimid膜相比，所有改性膜对选定的气体对均表现出增强的气体分离性能。在纳米复合膜中观察到最高的性能，将30 wt％的Pd @ ZIF-8掺入Matrimid中，导致H增加72％₂渗透性。H ₂ / CO ₂，H ₂ / CH ₄和H ₂ / N ₂的分离系数从Matrimid / ZIF-8的3.25、126.13、95.21分别提高到Matrimid /（Pd @ ZIF-8）的5.82、228.2和169.1 ）膜。最后，进料压力的增加大大改善了所有膜的分离性能。