Abstract Membrane contactor has been considered to be a prospective alternative to traditional technology for toxic acid gases capture. In this study, the mixed matix membrane contactors (MMMCs) with the metal organic frameworks (MOFs, MIL-101(Cr)) as fillers are fabricated for high-efficiency SO2 removal. The MIL-101(Cr) with microporous structure provides more SO2 channels for the enhancement of SO2 absorption flux. Moreover, the open metal sites from MIL-101(Cr) display the high affinity to SO2, which construct “SO2-philic” channels in the finger-like pore structure, resulting in the increment of SO2 removal efficiency. The introduction of MIL-101(Cr) into PVDF modifies the physical structure verified by scanning electron microscope (SEM), liquid entry pressure (LEPw) and gas permeation test et al. The newly developed MIL-101(Cr) doped MMMCs exhibit competitive hydrophobicity with the water contact angle of 119°. In particular, the M915 MMMC with MIL-101(Cr) loading 15 wt% displays the optimum SO2 absorption performance with the SO2 absorption flux and SO2 removal efficiency of 1.09 × 10−3 mol m−2 s−1 and 89.51%, respectively. The SO2 mass transfer coefficient in membrane (Km) is significantly enhanced to 4.44 × 10−3 m s−1 and membrane phase resistance (H/Km) is noticeably decreased to 92.96 s m−1. Besides, the MIL-101(Cr) doped MMMCs show both the alkali resistance and long-term stability.

中文翻译：

---

金属有机骨架装饰膜接触器构建亲二氧化硫通道以实现高效烟气脱硫

摘要 膜接触器被认为是传统有毒酸性气体捕集技术的替代技术。在这项研究中，制造了以金属有机骨架（MOF，MIL-101（Cr））作为填料的混合基质膜接触器（MMMC），用于高效去除 SO2。具有微孔结构的 MIL-101(Cr) 为增强 SO2 吸收通量提供了更多 SO2 通道。此外，MIL-101(Cr)的开放金属位点显示出对SO2的高亲和力，在指状孔结构中构建了“SO2-philic”通道，从而提高了SO2去除效率。将 MIL-101(Cr) 引入 PVDF 改变了通过扫描电子显微镜 (SEM)、液体进入压力 (LEPw) 和气体渗透测试等验证的物理结构。新开发的 MIL-101(Cr) 掺杂 MMMCs 表现出具有竞争力的疏水性，水接触角为 119°。特别是，M915 MMMC 与 MIL-101(Cr) 负载 15 wt% 显示出最佳的 SO2 吸收性能，SO2 吸收通量和 SO2 去除效率分别为 1.09 × 10−3 mol m−2 s−1 和 89.51% . 膜中 SO2 传质系数 (Km) 显着提高至 4.44 × 10-3 m s-1，膜相电阻 (H/Km) 显着降低至 92.96 s m-1。此外，MIL-101(Cr)掺杂的MMMCs表现出耐碱性和长期稳定性。分别为 09 × 10−3 mol m−2 s−1 和 89.51%。膜中 SO2 传质系数 (Km) 显着提高至 4.44 × 10-3 m s-1，膜相电阻 (H/Km) 显着降低至 92.96 s m-1。此外，MIL-101(Cr)掺杂的MMMCs表现出耐碱性和长期稳定性。分别为 09 × 10−3 mol m−2 s−1 和 89.51%。膜中 SO2 传质系数 (Km) 显着提高至 4.44 × 10-3 m s-1，膜相电阻 (H/Km) 显着降低至 92.96 s m-1。此外，MIL-101(Cr)掺杂的MMMCs表现出耐碱性和长期稳定性。