Zeolite membranes: Synthesis and applications
Zeolite membranes: Synthesis and applications
复制标题
DOI：
10.1016/j.seppur.2021.119295
复制
发表时间：
2021-09-20
影响因子：
8.6
通讯作者：
Drioli, Enrico
中科院分区：
文献类型：
--
作者：
Algieri, Catia;Drioli, Enrico
膜分离技术由于其低能耗、操作条件温和、高效等优点而受到广泛关注。聚合物膜因其制备成本低、重现性好等优点而广泛应用于各种分离过程中。污染以及渗透性和选择性之间的权衡代表了聚合物膜领域中的主要缺点。这些问题可以通过使用无机膜来克服，所述无机膜由于其亲水性、高化学稳定性以及高渗透性和选择性而不易于结垢。沸石膜是一种无机膜，由于其在分子水平上限定的孔径和高吸附性能，可以分离液体和气体物质（具有非常相似的尺寸和形状）。它们在不同的分离过程中进行了研究，如气体分离，渗透蒸发和脱盐。然而，它们在工业水平上仅用于通过渗透蒸发过程的醇脱水。事实上，尽管自第一篇关于沸石膜制备的科学论文以来已经过去了30年，但许多问题仍然没有解决，如合成的可重复性、沸石层中的缺陷以及高制造成本，这导致了它们的大规模应用的限制。本文综述了沸石分子筛膜的主要制备方法及其在开发和制备方面的新奇。讨论了它们在渗透蒸发和海水淡化中的应用。详细介绍了分子筛膜的拓扑结构和化学组成对天然气净化效果的影响。讨论了分子筛膜反应器在不同工业过程中的应用。最后提出了结论意见和未来展望。
Membrane-based technology has attracted considerable attention owing to its low energy consumption, mild operating conditions, and high efficiency. Polymeric membranes are widely utilized in different separation processes for their low cost and highly reproducible preparation. Fouling and the trade-off between permeability and selectivity represent the main drawbacks in the polymeric membrane field. These problems could be overcome by using inorganic membranes that are less prone to fouling due to their hydrophilic nature, high chemical stability, and high permeability and selectivity. Zeolite membranes, a type of inorganic membranes, can separate liquid and gas species (with very similar size and shape) thanks to their defined pore size at a molecular level and high adsorption property. They are studied in different separation processes as gas separation, pervaporation, and desalination. However, they find application, at the industrial level, only for alcohol dehydration by pervaporation process. Indeed, although 30 years are passed since the first scientific papers about the zeolite membrane preparation, many problems are still unsolved, as reproducibility of the synthesis, defects into the zeolite layer, and high manufacturing costs, which caused a limitation to their application on a large scale. In this review, the main zeolite membrane preparation methods and the novelty in their developing and fabricating have been analyzed. Their application in pervaporation and desalination has been discussed. The effect of zeolite membrane topology and chemical composition on natural gas purification has been presented in detail. The application of zeolite membrane reactors in different interesting processes has been discussed. Concluding remarks and future perspective have been also suggested.