Abstract A series of mixed matrix membranes using a commercially available aromatic polyimide (Matrimid® 5218) with nanoparticles formed from carbon, a porous organic polymer and metal organic frameworks were prepared to investigate the effects of flue gas impurities on gas permeation. We show that common impurities found in power station flue gases (H2S, SO2, and NO) have significant effects upon the performance of these mixed matrix membranes. The effects of NO, SO2 and H2S on the zeolitic imidazolate framework ZIF-8 are all large and rapid and would render these membranes unsuitable for flue gas service that do not use flue gas desulfurisation. Similarly, H2S adsorbs irreversibly into membranes containing copper benzene-1,3,5-tricarboxylate (Cu-BTC), although the impacts of NO and SO2 are less severe. The membranes containing a porous organic polymer or porous carbon are less affected by these contaminants. In particular, the permeability of the membrane containing the porous organic polymer is still significantly above that of the base Matrimid polymer after exposure for 80 days to 1000 ppm of each contaminant. Further, this mixed matrix structure shows enhanced H2S selectivity. These results suggest that MMMs prepared using organic based nanoparticles can be effective in gas separation applications such as natural gas sweetening, biogas purification and post-combustion carbon capture, when acid gases are present as an impurity.

中文翻译：

---

工业气体杂质对混合基质膜性能的影响

摘要 使用市售的芳香族聚酰亚胺 (Matrimid® 5218) 和由碳、多孔有机聚合物和金属有机骨架形成的纳米颗粒制备了一系列混合基质膜，以研究烟气杂质对气体渗透的影响。我们表明，电站烟气中常见的杂质（H2S、SO2 和 NO）对这些混合基质膜的性能有显着影响。NO、SO2 和 H2S 对沸石咪唑酯骨架 ZIF-8 的影响都很大且很快，并且会使这些膜不适用于不使用烟道气脱硫的烟道气服务。同样，H2S 不可逆地吸附到含有苯-1,3,5-三羧酸铜 (Cu-BTC) 的膜中，尽管 NO 和 SO2 的影响不那么严重。含有多孔有机聚合物或多孔碳的膜受这些污染物的影响较小。特别是，含有多孔有机聚合物的膜的渗透性在暴露于 1000 ppm 的每种污染物 80 天后仍显着高于基础 Matrimid 聚合物的渗透性。此外，这种混合基质结构显示出增强的 H2S 选择性。这些结果表明，当酸性气体作为杂质存在时，使用有机基纳米粒子制备的 MMM 可有效用于气体分离应用，例如天然气脱硫、沼气净化和燃烧后碳捕获。在暴露于 1000 ppm 的每种污染物 80 天后，含有多孔有机聚合物的膜的渗透性仍显着高于基础 Matrimid 聚合物的渗透性。此外，这种混合基质结构显示出增强的 H2S 选择性。这些结果表明，当酸性气体作为杂质存在时，使用有机基纳米粒子制备的 MMM 可有效用于气体分离应用，例如天然气脱硫、沼气净化和燃烧后碳捕获。在暴露于 1000 ppm 的每种污染物 80 天后，含有多孔有机聚合物的膜的渗透性仍显着高于基础 Matrimid 聚合物的渗透性。此外，这种混合基质结构显示出增强的 H2S 选择性。这些结果表明，当酸性气体作为杂质存在时，使用有机基纳米粒子制备的 MMM 可有效用于气体分离应用，例如天然气脱硫、沼气净化和燃烧后碳捕获。