何乃如, 田子谕, 王伟, 桓茜, 靳浩斌, 白帅丽. 甘蔗生物质炭在界面太阳能海水淡化中的应用[J]. 华南师范大学学报(自然科学版), 2024, 56(1): 44-52. doi: 10.6054/j.jscnun.2024006
引用本文: 何乃如, 田子谕, 王伟, 桓茜, 靳浩斌, 白帅丽. 甘蔗生物质炭在界面太阳能海水淡化中的应用[J]. 华南师范大学学报(自然科学版), 2024, 56(1): 44-52. doi: 10.6054/j.jscnun.2024006
HE Nairu, TIAN Ziyu, WANG Wei, HUAN Xi, JIN Haobin, BAI Shuaili. Application of Sugarcane Biomass Carbon in Interface Solar Seawater Desalination[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(1): 44-52. doi: 10.6054/j.jscnun.2024006
Citation: HE Nairu, TIAN Ziyu, WANG Wei, HUAN Xi, JIN Haobin, BAI Shuaili. Application of Sugarcane Biomass Carbon in Interface Solar Seawater Desalination[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(1): 44-52. doi: 10.6054/j.jscnun.2024006

甘蔗生物质炭在界面太阳能海水淡化中的应用

Application of Sugarcane Biomass Carbon in Interface Solar Seawater Desalination

  • 摘要: 太阳能驱动的界面水蒸发作为环保、高效、可持续的海水淡化技术,在近年来受到广泛关注。快速的水运输、高效的光热转换是实现持续、稳定蒸发的关键。多级孔道的生物质衍生蒸发器在太阳能水蒸发应用中展示出高效、环保、可持续的应用潜力。以废弃的甘蔗节为原料,利用冷冻干燥和高温碳化工艺制备了具有天然多级孔道结构的生物质基蒸发器,并研究了材料的光吸收、水运输和蒸发性能以及不同风速下对流空气对蒸发器的蒸发性能和热损失的改善作用。结果表明:具有发达的多级孔道结构的生物质基蒸发器展示出了高达92.8%的太阳光吸收率。在一倍太阳光强下展示出1.55 kg/(m2·h)的蒸发速率和77.6%的光热转换效率。此外,在风速2 m/s的条件下,蒸发器的蒸发速率展示出了高达2.27 kg/(m2·h)的蒸发速率和91.6%的光热转换效率,显示了对流效应对淡水产出速率的增强和对热损失的抑制作用。

     

    Abstract: Solar-driven interfacial water evaporation, as an environmentally friendly, efficient, and sustainable desalination technology, has received extensive attention in recent years. Fast water transport and efficient photothermal conversion performance are the key points to achieve continuous and steady evaporation. Biomass-derived evaporators with multi-level pores demonstrate the potential for efficient, eco-friendly, and sustainable applications in solar water evaporation. A biomass-based evaporator with a natural porous structure was designed from discarded sugarcane knots using freeze-drying and high-temperature carbonization methods, and its light absorption, water transport, and evaporation capabilities were studied. It is reported that convective air with different wind speeds has an improving effect on the evaporation performance and heat loss of the evaporator. The results showed that the biomass-based evaporator with a well-developed microchannel structure had a solar absorption of 92.8%, an evaporation rate of 1.55 kg/(m2·h) and a light-to-heat conversion efficiency of 77.6% under 1 sun. Furthermore, at a wind speed of 2 m/s, the evaporation rate and the photothermal conversion efficiency of the evaporator reached 2.27 kg/(m2·h) and 91.6%, respectively, showing the enhancement of the freshwater yield rate by convective effects and the suppression of heat loss.

     

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