2D+3D供水的木基光热蒸发器及其性能评价

孙乐汀; 刘会娥; 陈爽; 于洁; 李婷

2D+3D供水的木基光热蒸发器及其性能评价

中国石油大学(华东) 化学化工学院, 青岛 266580

基金项目: 国家自然科学基金 (22078366)

详细信息

通讯作者:
刘会娥，博士，教授，研究方向为新型碳材料制备　E-mail: liuhuie@upc.edu.cn

中图分类号: X703; TB332
计量
- 文章访问数: 24
- HTML全文浏览量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2024-03-05
- 修回日期: 2024-03-28
- 录用日期: 2024-04-04
- 网络出版日期: 2024-04-26

Property assessment of wood-based photothermal evaporator with 2D+3D water supplying

College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China

Funds: National Natural Science Foundation of China (No.22078366)

摘要

摘要: 近年来，随着经济和社会快速发展，全球淡水资源需求量不断增加，导致全球淡水资源愈加紧缺。海水淡化是目前解决淡水短缺问题最好的方式之一。为实现海水的快速蒸发，本课题制备了高度为20 mm、碳化层厚度为3 mm的脱木素轻木木基光热材料(CDW)，通过SEM、FT-IR、Raman光谱、Uv-Vis-NIR吸收光谱等表征实验证实所制备的材料具有丰富的孔道和良好的吸光性能，有利于水的光热蒸发。构建2D+3D供水的小型光热蒸发器，采用吸水纸向光热材料供水，对所制备的CDW材料进行了光热水蒸发性能评价，所获得的平均蒸发速率为1.5310 kg/(m²·h)，较碳化原木有明显提升。通过与无供水情况下的光热实验对比，证实吸水纸能够稳定给材料提供水源；通过与材料直接接触水面的3D供水情况作对比，证实了2D+3D供水结构的优越性。
- 轻木 /
- 蒸发 /
- 太阳能 /
- 碳化木材 /
- 海水淡化 /
- 复合材料
Abstract: In recent years, with the rapid development of the economy and society, the global demand for freshwater resources has been continuously increasing, leading to an increasing shortage of freshwater resources worldwide. Desalination of seawater is one of the best ways to solve the problem of freshwater shortage recently. In order to achieve rapid evaporation of seawater, a photothermal material based on a delignified balsa wood (CDW) was prepared, which had a height of 20 mm and a carbonization layer with thickness of 3 mm. Characterization experiments such as SEM, FT-IR, Raman, and UV-Vis-NIR absorption spectrum have confirmed that the prepared material has abundant pores and high solar absorbance, which is beneficial for photothermal evaporation. A small photothermal evaporator with 2D+3D water supplying paths, transferring water to the photothermal material using absorbent paper, was used to evaluate the evaporation performance of CDW. The average evaporation rate of the prepared CDW material is 1.5310 kg/(m²·h). The evaporation rate is higher than the directly carbonized balsa wood. The comparison between the above results and that without water supply confirmed that the absorbent paper can steadily supply water to the material. The advantages of the 2D+3D water supplying structure are also observed when compared with the 3D water supplying structure.
- Balsa wood /
- Evaporation /
- Solar energy /
- Carbonized wood /
- Seawater desalination /
- Composite

HTML全文

图 1 光热实验示意图 (a)装置整体(1—氙灯，2—小型蒸发器，3—电子天平)； (b)2D+3D供水通道示意图(1—碳化层，2、4、9—PS隔热泡沫，3—材料输水层，5—空气层，6—吸水纸，7—水体，8—烧杯)

Figure 1. Schematic diagram of photothermal experiment (a) Apparatus(1- xenon lamp, 2- small evaporator, 3- elec-tronic balance)； (b)Schematic diagram of 2D+3D water supply channel(1- carbonization layer， 2、4、9- PS insulated foam, 3- material water transport layer, 5- air, 6- absorbent paper, 7- water, 8- beaker)

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图 2 横切面的SEM (a)轻木原木(Mag=500×X)； (b)脱木素木(Mag=500×X)

Figure 2. SEM of cross section (a)balsa (Mag=500×X); (b) delignified wood (Mag=500×X)

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图 3 纵切面的 SEM (a)轻木原木(Mag=200×X)； (b)脱木素木(Mag=200×X)

Figure 3. SEM of longitudinal section (a)balsa (Mag=200×X); (b) delignified wood (Mag=200×X)

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图 4 碳化脱木素轻木木基光热材料(CDW)碳化层的横切面SEM (a) Mag=500×X；(b) Mag=100×X

Figure 4. SEM of photothermal material based on a deligni-fied balsa wood (CDW) carbonized layer’s cross section (a) Mag=500×X; (b) Mag=100×X

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图 5 CDW碳化层的纵切面SEM： 100 μm(Mag=100×X)

Figure 5. SEM of CDW carbonized layer’s longitudinal section: 100 μm (Mag=100×X)

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图 6 CDW和轻木原木的Uv-Vis-NIR吸收光谱

Figure 6. Uv-Vis-NIR absorption spectra of CDW and balsa

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图 7 CDW、脱木素木和轻木原木的FT-IR谱图

Figure 7. FT-IR of CDW, delignified wood and balsa

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图 8 CDW、脱木素木和轻木原木的拉曼谱图

Figure 8. Raman of CDW, delignified wood and balsa

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图 9 CDW在3 h内的有无供水情况 (a)水蒸发量曲线图；(b)材料顶面温度曲线图

Figure 9. CDW with or without water supply within 3 hours (a) weightlessness curves of water; (b) temperature curve of materials' surface

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图 10 材料(CDW、原木、脱木素木、碳化原木) 在 4 h 内 (a)水蒸发量曲线图；(b)材料顶面温度曲线图

Figure 10. Material (CDW, balsa, delignified balsa wood, carbonized balsa wood) within 4 hours (a) weightlessness curves of water; (b) temperature curve of materials' surface

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表 1 CDW与其他文献工作报道的材料对比表

Table 1. Comparison of materials reported by CDW and other literatures (1 sun)

Material	Evaporation rate/(kg·(m²·h)⁻¹)	Evaporation efficiency/%	Reference
APDA-Wood	0.91	77.0	Zou et al.(2021)
CS-Wood	0.95	67.9	Wang et al.(2019)
F-Wood	1.05	72.0	Xue et al.(2020)
CPS	1.20	82.2	Lu et al.(2020)
Fe-D-Wood	1.30	73.0	Song et al.(2021)
ALD/Chinese Ink-coated Wood	1.31	82.2	Yang et al.(2019)
PPy-Wood	1.33	83.0	Huang et al.(2019)
Wood@ATP	1.42	90.8	Chen et al.(2017)
CDW	1.53	91.5	This work
Notes：APDA-Wood: Wood-based material modified with arginine polydopamine; CS-Wood: candle soot-decorated wood; F-Wood: Wood treated with alcohol flame; CPS: Carbonized pencil shaving; Fe-D-Wood: Fe₃O₄/polyvinyl alcohol decorated delignified wood; ALD/Chinese Ink-coated Wood: Wood-based material loaded with Chinese ink; PPy-Wood: Wood loaded with polypyrrole; Wood@ATP: Aluminophosphate-treated wood; CDW: Carbonized delignified wood.

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