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Self‐Cleaning Integrative Aerogel for Stable Solar‐Assisted Desalination

机译:用于稳定太阳能辅助海水淡化的自清洁综合气凝胶

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摘要

The solar‐assisted desalination generator (SADG) shows great potential for solving water scarcity problems. However, salt precipitation and accumulation is still a challenge for SADG, which slows down solar steam generation performance of evaporator during operation. Here, a facile integrative evaporator featuring stable and high evaporation performance breaks this bottleneck. By using a rational design in which amorphous carbon particles are evenly composited within the porous chitosan aerogel, the evaporator not only integrates excellent light absorption, heat management, and water transportation abilities but also endows a large vapor escape space. Upon desalination, salt concentration ingredients between carbon particles and chitosan membranes can be quickly balanced by water transport in interconnected chitosan chains, and thus salt precipiation on the evaporator surface would be avoided. Compared to other salt‐rejection evaporators, the integrative evaporator can operate in 3.5 wt% brine for 60 days without salt precipiation and exhibits a stable evaporation rate (1.70 kg m−2 h−1), indicating its potential for practical applications in seawater desalination and the harvest of clean drinking water.
机译:太阳能辅助的脱盐发电机(SADG)显示了解决水资源稀缺问题的巨大潜力。然而,盐沉淀和积累仍然是SADG的挑战,其在运行期间减缓了蒸发器的太阳能蒸汽发电性能。这里,具有稳定和高蒸发性能的容易的一体化蒸发器断裂了这一瓶颈。通过使用合理的设计,其中非晶碳颗粒在多孔壳聚糖气体内均匀地赋予,蒸发器不仅整合了优异的光吸收,热量管理和水运输能力,而且还赋予了大的蒸汽逃生空间。在脱盐后,碳颗粒和壳聚糖膜之间的盐浓度成分可以通过互连的壳聚糖链中的水运输快速平衡,因此避免蒸发器表面上的盐沉淀。与其他盐排斥蒸发器相比,整合蒸发器可以在3.5wt%盐水中操作60天,没有盐沉淀,表现出稳定的蒸发速率(1.70kg m-2 h-1),表明其对海水脱盐中的实际应用的可能性和清洁饮用水的收获。

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