Hassanzadeh Hossein, Abedini Reza, Ghorbani Mohsen
Enhanced Oil Recovery (EOR) and Gas Processing Research Lab, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran.
Polymer Research Lab, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran.
Sci Rep. 2025 Aug 25;15(1):31233. doi: 10.1038/s41598-025-14227-1.
CO separation from N and CH is increasingly important due to environmental and industrial concerns. Membrane-based separation using polymeric materials offers advantages such as energy efficiency, easy processing, and cost-effectiveness. In this study, mixed matrix membranes (MMMs) based on CO-philic Pebax 2533 were fabricated and modified in two steps to enhance CO separation performance. In the first step, Sorbitol was incorporated at various loadings (5-20 wt%), with 15 wt% found to be optimal, achieving CO permeability of 394.5 Barrer and selectivities of 13.11 (CO/CH) and 48.70 (CO/N) at 30 °C and 2 bar. Sorbitol enhanced membrane crystallinity and thermal stability, as confirmed by FTIR, DSC, and TGA. In the second step, Ag nanoparticles (AgNPs) were introduced (up to 5 wt%) into the Pebax/Sorbitol matrix to exploit facilitated CO transport mechnisem. FESEM showed changes in morphology and increased chain rigidity. The optimized membrane (P/S-15/Ag-5) exhibited a 19.5% increase in CO permeability compared to P/S-15, while maintaining the selectivities. The combined effect of Sorbitol and AgNPs led to improved thermal and separation properties, making the developed MMMs promising candidates for efficient CO separation applications.
由于环境和工业方面的考虑，从氮气和甲烷中分离一氧化碳变得越来越重要。使用聚合物材料的膜基分离具有能源效率高、易于加工和成本效益高等优点。在本研究中，基于亲一氧化碳的Pebax 2533制备了混合基质膜（MMM），并分两步进行改性以提高一氧化碳分离性能。第一步，以不同负载量（5-20 wt%）加入山梨醇，发现15 wt%为最佳负载量，在30°C和2 bar条件下，一氧化碳渗透率达到394.5 Barrer，对甲烷的选择性为13.11（CO/CH），对氮气的选择性为48.70（CO/N）。通过傅里叶变换红外光谱（FTIR）、差示扫描量热法（DSC）和热重分析法（TGA）证实，山梨醇提高了膜的结晶度和热稳定性。第二步，将银纳米颗粒（AgNPs）引入（最高5 wt%）Pebax/山梨醇基质中，以利用促进一氧化碳传输机制。场发射扫描电子显微镜（FESEM）显示了形态变化和链刚性增加。与P/S-15相比，优化后的膜（P/S-15/Ag-5）一氧化碳渗透率提高了19.5%，同时保持了选择性。山梨醇和银纳米颗粒的联合作用导致热性能和分离性能得到改善，使所开发的混合基质膜成为高效一氧化碳分离应用的有前途的候选材料。
