Recovery of free volume in PIM-1 membranes through alcohol vapor treatment
Recovery of free volume in PIM-1 membranes through alcohol vapor treatment
复制标题
DOI：
10.1007/s11705-020-2001-2
复制
发表时间：
2021-02-10
影响因子：
4.5
通讯作者：
Gorgojo, Patricia
中科院分区：
文献类型：
--
作者：
Almansour, Faiz;Alberto, Monica;Gorgojo, Patricia
物理老化是目前PIM-1气体分离膜商业化的主要障碍。在实验室规模上逆转PIM-1膜物理老化效应的一种众所周知的方法是将它们浸泡在低级醇中，如甲醇和乙醇。然而，这一程序似乎不适用于工业层面，必须调查其他策略。在这项工作中，开发了一种用乙醇蒸气(乙醇或甲醇)再生的方法来恢复老化的PIM-1膜的渗透性，并与传统的液体浸泡方法进行了比较。用CO2和CH4(1：1，v：v)的二元混合物对再生方法前后的气体渗透性和分离性能进行了评估。我们的结果表明，8小时的甲醇蒸气处理足以恢复原始的气体渗透率，达到二氧化碳渗透率>；7000巴。
Physical aging is currently a major obstacle for the commercialization of PIM-1 membranes for gas separation applications. A well-known approach to reversing physical aging effects of PIM-1 membranes at laboratory scale is soaking them in lower alcohols, such as methanol and ethanol. However, this procedure does not seem applicable at industrial level, and other strategies must be investigated. In this work, a regeneration method with alcohol vapors (ethanol or methanol) was developed to recover permeability of aged PIM-1 membranes, in comparison with the conventional soaking-in-liquid approach. The gas permeability and separation performance, before and post the regeneration methods, were assessed using a binary mixture of CO2 and CH4 (1:1, v:v). Our results show that an 8-hour methanol vapor treatment was sufficient to recover the original gas permeability, reaching a CO2 permeability > 7000 barrer.