使用ZIF-8膜高效分离含乙炔混合物
Efficient Separation of Acetylene-Containing Mixtures Using ZIF-8 Membranes.
作者信息
Zhu Shiyuan, Lin Quanjie, Huang Xiaopeng, Chen Liangji, Liu Lizhen, Yao Zizhu, Xiang Shengchang
机构信息
Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China.
School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China.
出版信息
ACS Omega. 2021 Nov 19;6(48):33018-33023. doi: 10.1021/acsomega.1c05126. eCollection 2021 Dec 7.
Metal-organic framework (MOF) membranes show great potential in the separation of acetylene mixtures. In this work, we have prepared ZIF-8 membranes on polyamide (PA) substrates for the highly selective separation of acetylene/methane and acetylene/carbon dioxide mixtures. The CH/CH and CH/CO mixtures can be successfully separated using the ZIF-8 membranes, with separation factors of 12.1 and 1.8, respectively. Based on the results of the cross-permeation tests of CH/CH, CO/CH, and CH/CO, the separation mechanism of CH/CH in our ZIF-8 membrane can be attributed to a higher affinity for acetylene and molecular sieving effect, while CH/CO separation is related to thermodynamic factors. It is worth noting that this is the first example of MOF membranes to successfully separate CH from CH and CO.
金属有机框架（MOF）膜在乙炔混合物的分离方面显示出巨大潜力。在这项工作中，我们在聚酰胺（PA）基底上制备了ZIF-8膜，用于高效选择性分离乙炔/甲烷和乙炔/二氧化碳混合物。使用ZIF-8膜可以成功分离CH/CH和CH/CO混合物，分离因子分别为12.1和1.8。基于CH/CH、CO/CH和CH/CO的交叉渗透测试结果，我们的ZIF-8膜中CH/CH的分离机制可归因于对乙炔的更高亲和力和分子筛效应，而CH/CO分离则与热力学因素有关。值得注意的是，这是MOF膜首次成功从CH和CO中分离出CH的实例。
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