ABSTRACT

Propane (C₃H₈) and propylene (C₃H₆) are important energy resources and raw materials for industrial chemistry. Today, propylene/propane separations are carried out by expensive distillation operations which are energy intensive. Therefore, there is a great interest in the development of new separation technologies like membrane modules. In this work, we collected and analyzed the data from neat polymers and mixed matrix membranes (MMM) for propylene/propane separations. Polymeric membranes are easily processed, but one important problem is plasticization since both propylene and propane are condensable gases resulting in a loss of selectivity. To improve the properties of polymer membranes, MMM were developed based on an inorganic filler and a polymer matrix to get improved performances with a synergistic effect. However, these performances strongly depend on the filler type and content, as well as their compatibility. In this review, the separation performances of neat polymers and MMM flat membranes and hollow fibers are reported. A comparison of the single gas and mixed gas permeation is presented where both permeability and selectivity are lost due to plasticization and the competitive sorption between gas molecules. Based on the results available, it can be concluded that more development can lead to improved performances for industrial-scale applications in the petroleum industries. Also, an upper bound for C₃H₆/C₃H₈ separation is proposed using neat polymers.

摘要

丙烷 (C ₃ H ₈ ) 和丙烯 (C ₃ H ₆) 是重要的能源资源和工业化学原料。今天，丙烯/丙烷的分离是通过昂贵的能量密集型蒸馏操作进行的。因此，人们对开发新的分离技术（如膜组件）产生了极大的兴趣。在这项工作中，我们收集并分析了用于丙烯/丙烷分离的纯聚合物和混合基质膜 (MMM) 的数据。聚合物膜易于加工，但一个重要问题是塑化，因为丙烯和丙烷都是可冷凝气体，导致选择性损失。为了改善聚合物膜的性能，基于无机填料和聚合物基体开发了 MMM，以获得具有协同效应的改进性能。然而，这些性能很大程度上取决于填料的类型和含量，以及它们的相容性。在这篇综述中，报告了纯聚合物和 MMM 平膜和中空纤维的分离性能。比较了单一气体和混合气体渗透，其中渗透性和选择性均因塑化和气体分子之间的竞争吸附而丧失。根据现有结果，可以得出结论，更多的开发可以提高石油工业中工业规模应用的性能。此外，C 的上限 比较了单一气体和混合气体渗透，其中渗透性和选择性均因塑化和气体分子之间的竞争吸附而丧失。根据现有结果，可以得出结论，更多的开发可以提高石油工业中工业规模应用的性能。此外，C 的上限 比较了单一气体和混合气体渗透，其中渗透性和选择性均因塑化和气体分子之间的竞争吸附而丧失。根据现有结果，可以得出结论，更多的开发可以提高石油工业中工业规模应用的性能。此外，C 的上限₃ H ₆ /C ₃ H ₈分离建议使用纯聚合物。