In this study, for the first time, the small pore size (0.28 × 0.37 nm) Li–aluminosilicate zeolite membrane was synthesized for separation of CO₂ from H₂–CO₂ and H₂–CO₂–N₂–CO (simulated blast furnace gas) gas mixtures. Li–aluminosilicate membranes were prepared on porous clay alumina tubes by sonication mediated hydrothermal method using pre synthesized zeolite powders as seeds. The zeolite formation was confirmed by X-ray diffraction pattern and FESEM analysis. The scanning electron micrograph of the membrane, suggested the uniformity of the dense structure of the membrane. Single-gas and mixed-gas permeation experiments through membranes were carried out at 25 °C using H₂, CO₂ and N₂ single-component gases and mixture of H₂–CO₂, H₂–CO₂–N₂–CO for simulated blast furnace gas composition. Synthesized Li–aluminosilicate zeolite shows appreciable CO₂ adsorption capacity at liquid nitrogen temperature compared with other reported zeolites. In case of single gas permeation, membrane shows usual pattern of permeation. For mixture gas, separation efficiency of Li–zeolite membrane increased abruptly compared to the other zeolite membranes. The maximum CO₂–H₂, CO₂–N₂ and CO₂–CO separation selectivities were found to be 78, 8.7 and 67.3 respectively, with permeance of H₂, CO₂ and N₂ 2.21 × 10⁻⁷, 1.01 × 10⁻⁷ and 0.8 × 10⁻⁷ mol m⁻² s⁻¹ Pa⁻¹ at 25 °C respectively.

在本研究中，首次合成了小孔径（0.28×0.37 nm）的锂铝硅酸盐分子筛膜，用于从H ₂ –CO ₂和H ₂ –CO ₂ –N ₂ –CO中分离出CO ₂（模拟高炉煤气）气体混合物。锂铝硅酸盐膜是通过使用预先合成的沸石粉末作为种子，通过超声介导的水热法在多孔粘土氧化铝管上制备的。通过X射线衍射图和FESEM分析确认了沸石的形成。膜的扫描电子显微照片表明膜致密结构的均匀性。在25°C下使用H进行通过膜的单气体和混合气体渗透实验₂，用于模拟高炉煤气成分的CO ₂和N ₂单组分气体以及H ₂ -CO ₂，H ₂ -CO ₂ -N ₂ -CO的混合物。与其他报道的沸石相比，合成的锂铝硅酸盐沸石在液氮温度下显示出可观的CO ₂吸附能力。在单一气体渗透的情况下，膜显示出通常的渗透模式。对于混合气体，与其他沸石膜相比，锂沸石膜的分离效率急剧提高。最大CO ₂ -H ₂，CO ₂ -N ₂和CO ₂发现-CO分离选择性为78，8.7和67.3分别的H渗透性₂，CO ₂和N ₂ 2.21×10 ^-7，1.01×10 ^-7和0.8×10 ^-7 摩尔米^-2 小号^-1  Pa ^-1分别在25°C下。