文章基本信息

标题：Efficient Solar‐Thermal Distillation Desalination Device by Light Absorptive Carbon Composite Porous Foam
本地全文：下载
作者：Gyoung Gug Jang ; James William Klett ; Joanna McFarlane 等
期刊名称：Global Challenges
印刷版ISSN：2056-6646
电子版ISSN：2056-6646
出版年度：2019
卷号：3
期号：8
页码：1-8
DOI：10.1002/gch2.201900003
语种：English
出版社：John Wiley & Sons, Ltd
摘要：AbstractSolar‐thermal driven desalination based on porous carbon materials has promise for fresh water production. Exploration of high‐efficiency solar desalination devices has not solved issues for practical application, namely complicated fabrication, cost‐effectiveness, and scalability. Here, direct solar‐thermal carbon distillation (DS‐CD) tubular devices are introduced that have a facile fabrication process, are scalable, and use an inexpensive but efficient microporous graphite foam coated with carbon nanoparticle and superhydrophobic materials. The “black” composite foam serving as a solar light absorber heats up salt water effectively to produce fresh water vapor, and the superhydrophobic surface of the foam traps the liquid feed in the device. Two proof‐of‐principle distillation systems are adopted, i.e., solar still and membrane distillation and the fabricated devices are evaluated for direct solar desalination efficiency. For the solar still, nanoparticle and fluorosilane coatings on the porous surface increase the solar energy absorbance, resulting in a solar‐steam generation efficiency of 64% from simulated seawater at 1 sun. The membrane distillation demonstrates excellent vapor production (≈6.6 kg m‐2h‐1) with >99.5% salt rejection under simulated 3 sun solar‐thermal irradiation. Unlike traditional solar desalination, the adaptable DS‐CD can easily be scaled up to larger systems such as high‐temperature tubular modules, presenting a promising solution for solar‐energy‐driven desalination.Solar absorptive molecular‐nanostructural coating on thermal conductive graphite foamenhances solar–thermal conversion efficiency, and superhydrophobic micro‐porous structures in the engineered membrane skin layer allow water vapor to permeate through a membrane and trap the bulk salt liquid within the device.
关键词：distillationgraphite foamsolar desalinationsuperhydrophobicity