Improving seawater desalination efficiency by solar driven interfacial evaporation based on biochar evaporator of Nannochloropsis oculata residue
Improving seawater desalination efficiency by solar driven interfacial evaporation based on biochar evaporator of Nannochloropsis oculata residue
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DOI：
10.1016/j.jece.2021.105787
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发表时间：
2021-08
影响因子：
7.7
通讯作者：
Qi Zhang;Yingshi Zhang;Yung-Shen Shen-Yung-Shen-Shen-13416764;Qing-Qing Ye-Qing;Qilin Cai;Xi Wu
中科院分区：
文献类型：
--
作者：
Qi Zhang;Yingshi Zhang;Yung-Shen Shen-Yung-Shen-Shen-13416764;Qing-Qing Ye-Qing;Qilin Cai;Xi Wu
太阳能驱动的界面蒸发技术在海水淡化、污水净化和蒸汽发电应用中具有巨大的潜力。界面蒸发器主要由太阳能吸收层和用于隔热和输水的衬底组成。然而，用于太阳能吸收层和衬底的材料通常价格昂贵，难以生产，不利于大规模应用。为此，开发了一种新型多孔型微藻生物炭太阳能界面蒸发器(MBSIE)，用于高性能太阳能水蒸气发电。以生物柴油生产过程中产生的微藻--眼小球藻的残渣为原料，合成了太阳能吸收层。基板由聚苯乙烯泡沫塑料和吸水棉棒组成，并进行了优化的水路设计。该材料对光的吸收率达到94.1%，且材料中含有C-O、N-H等亲水性基团，有利于水分输送。在一个太阳辐射强度下，最大海水蒸发率为1.165−2 h−1。在L−1和0.06‰的条件下，采出淡水的总溶解固形物和盐度分别为2650 mg和0.06 mg。这样的淡水水质可以达到生活用水标准。
Solar driven interfacial evaporation technologies have significant potential in seawater desalination, sewage purification and steam power generation applications. The interfacial evaporator is primarily composed of a solar absorption layer and a substrate for thermal insulation and water conveyance. However, the materials used in the solar absorption layer and substrate are typically expensive and difficult to produce, which is not conducive to large-scale application. Herein, a novel porous microalgae biochar solar interfacial evaporator (MBSIE) was developed for high-performance solar-driven water vapor generation. The solar absorption layer was synthesized with the residue of the microalgae speciesNannochloropsis oculata, which was generated from the process of biodiesel production. The substrate was composed of polystyrene foam and absorbent cotton sticks with an optimized water channel design. The light absorptivity of porousNannochloropsis oculatabiochar reached 94.1%, and the material contains hydrophilic groups such as C–O and N–H, which was conducive to water delivery. MBSIE attains a maximum seawater evaporation rate of 1.165 kg m−2h−1under one Sun irradiation intensity. The total dissolved solids and salinity of the produced fresh water was 265 mg L−1and 0.06‰, respectively. This quality of freshwater could meet domestic water standards.