气候变化领域集成服务门户(CCPortal): Nature-inspired salt resistant bimodal porous solar evaporator for efficient and stable water desalination

CCPortal

DOI	10.1039/c9ee00945k
	Nature-inspired salt resistant bimodal porous solar evaporator for efficient and stable water desalination
	He S.; Chen C.; Kuang Y.; Mi R.; Liu Y.; Pei Y.; Kong W.; Gan W.; Xie H.; Hitz E.; Jia C.; Chen X.; Gong A.; Liao J.; Li J.; Ren Z.J.; Yang B.; Das S.; Hu L.
发表日期	2019
ISSN	1754-5692
起始页码	1558
结束页码	1567
卷号	12 期号:5
英文摘要	The shortage of clean water is one of the predominant causes of human mortality, especially in remote rural areas. Currently, solar steam generation is being adopted as an efficient, sustainable, and low-cost means for water desalination to produce clean water. However, preventing salt accumulation during operation while maintaining long-term stability and a rapid evaporation rate is a critical challenge that needs to be urgently addressed to further facilitate the practical applications of solar desalination, especially for desalinating high-salinity brine. Here, we demonstrate that a bimodal porous structure (e.g., balsa wood) can serve as an efficient and stable solar vapor generator for high-salinity brine desalination. Taking advantage of the inherent bimodal porous and interconnected microstructures of balsa wood, rapid capillary transport through the microchannels and efficient transport between the micro- and macrochannels through ray cells and pits in the bimodal evaporator can lead to quick replenishment of surface vaporized brine to ensure fast and continuous clean water vapor generation. The bimodal evaporator demonstrates a rapid evaporation rate of 6.4 kg m-2 h-1 under 6 suns irradiation and outstanding long-term stability for desalination of high salinity brine. The large vessel channels play a critical role in preventing salt from accumulating, as evidenced by controlled experiments with large vessels either blocked in the bimodal evaporator (balsa evaporator) or absent in a unimodal evaporator (e.g., cedar wood) whose porous structure occurs naturally without large vessels. Both approaches demonstrate severe salt accumulation during solar desalination due to a lack of sufficient brine replenishment from the bulk solution beneath. With its unique bimodal porous and interconnected microstructure configuration obtained by a facile and scalable fabrication method, our bimodal porous structured evaporator device represents an efficient, stable, low-cost, and environmentally friendly solar vapor generator for high-salinity brine desalination. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Costs; Evaporation; Evaporators; Microstructure; Porosity; Water filtration; Bimodal Porous Structure; Capillary transport; Controlled experiment; Critical challenges; High salinity brines; Long term stability; Microstructure configurations; Salt accumulations; Desalination; desalination; energy efficiency; experimental study; instrumentation; long-term change; microstructure; porous medium; salt; Costs; Deionization; Evaporation; Evaporators; Microstructure; Porosity
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162497
作者单位	Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States; Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, United States; Dept. of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ 08544, United States; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China
推荐引用方式 GB/T 7714	He S.,Chen C.,Kuang Y.,et al. Nature-inspired salt resistant bimodal porous solar evaporator for efficient and stable water desalination[J],2019,12(5).
APA	He S..,Chen C..,Kuang Y..,Mi R..,Liu Y..,...&Hu L..(2019).Nature-inspired salt resistant bimodal porous solar evaporator for efficient and stable water desalination.Energy and Environmental Science,12(5).
MLA	He S.,et al."Nature-inspired salt resistant bimodal porous solar evaporator for efficient and stable water desalination".Energy and Environmental Science 12.5(2019).