Aqueous salt solution liquid membranes, supported by nanoparticles, for water extraction from the atmosphere via air dehumidification
Aqueous salt solution liquid membranes, supported by nanoparticles, for water extraction from the atmosphere via air dehumidification
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DOI：
10.1002/jctb.5637
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发表时间：
2018-03
影响因子：
3.4
通讯作者：
A. Kudasheva;Yi-Jie Liu;A. Ito
中科院分区：
文献类型：
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作者：
A. Kudasheva;Yi-Jie Liu;A. Ito
背景膜技术是开发可持续空气除湿机的一种有前景的解决方案，因为它通常被认为是一种经济有效的技术，而且通过膜除湿过程从空气中回收的水可以循环利用。结果通过纳米级添加剂负载方法制备的盐溶液液膜用于空气除湿，从水渗透率和冷凝水回收率方面评估了其效率。研究发现，不仅选择性膜材料的性质，而且膜支撑材料的类型也对液膜的整体性能产生影响。由表面处理的炭黑纳米粒子支撑的膜在 75–80%RH 下的水回收率为 12 g h−1，平均水渗透率为 9 × 10−12kmol m/(m2s kPa)。最具选择性的液膜是 LiBr 和 CaCl2，由表面处理的炭黑支撑，水蒸气/空气分离系数分别为 34 300 和 21 700。结论这项工作首次证明了液膜中无机盐水溶液在除湿应用中的适用性。制备的液膜在 1 个月内表现出中等的冷凝水回收率和膜稳定性。 © 2018 中国化学工业学会
BACKGROUNDMembrane technology is a promising solution for the development of a sustainable air dehumidifier because it is, in general, considered a cost‐effective technology and, moreover, water recovered from the air via membrane‐based dehumidification process can be recycled.RESULTSThe efficiency of aqueous salt solution liquid membranes that were prepared by a nano‐sized additive supporting method and applied for the dehumidification of air, was evaluated in terms of the water permeability and condensed water recovery rate. It was found that not only the nature of the selective membrane material but also the type of membrane supporting material has an impact on the overall liquid membrane performance. Membranes supported by surface treated carbon black nanoparticles showed a water recovery rate of 12 g h−1at 75–80%RH and average water permeability of 9 × 10−12kmol m/(m2s kPa). The most selective liquid membranes were LiBr and CaCl2, supported by surface treated carbon black, with water vapor/air separation factor of 34 300 and 21 700, respectively.CONCLUSIONSThis work for the first time demonstrates the applicability of aqueous inorganic salt solutions in liquid membranes for dehumidification applications. Prepared liquid membranes showed moderate condensed water recovery rates and membrane stability over 1 month. © 2018 Society of Chemical Industry