RuiJie Mao, Xi Chen, RuHong Zhou, Rui Long, ZhiChun Liu, Wei Liu
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引用次数: 0
摘要
纳米流体反向电渗析过程中不可避免地会出现膜污垢。在此,我们系统地研究了不对称配置下多重污垢对带负电的锥形纳米通道能量转换性能的影响。结果发现,在配置 I 中,即在顶端一侧施加高浓度溶液,在浓度比很小的情况下,多重污垢会降低电功率。在配置 II 中,即在尖端侧使用低浓度溶液时,靠近基底侧的多重污垢会增加电功率。任何在低浓度入口附近形成的污垢都会降低电功率和能量转换效率。在配置 I 和配置 II 中,多重污垢分别降低了 69.27% 和 99.94% 的电能消耗。在配置 I 中,电功率首先随着污垢表面电荷密度的增加而增加,达到最大值,然后下降。在配置 II 中,电功率先是随着污垢表面电荷密度的增加而减小,达到最小值后又增大。污垢的大负电荷密度或大正电荷密度有助于提高电功率和能量转换效率。
Impacts of multi-foulings on salinity gradient energy conversion process in negatively charged conical nanochannels
Membrane fouling inevitably occurs during nanofluidic reverse electrodialysis. Herein, the impact of multi-fouling on the energy conversion performance of negatively charged conical nanochannels under asymmetrical configurations is systematically investigated. The results reveal that in Configuration I, where a high-concentration solution is applied at the tip side, at small concentration ratios, multiple foulings reduce the electric power. In Configuration II, where a low-concentration solution is applied at the tip side, multiple foulings near the base side contribute to the electric power. Any fouling that formed near the low-concentration entrance diminished the electric power and energy conversion efficiency. Multi-fouling lowered the electrical power consumption by 69.27% and 99.94% in Configurations I and II, respectively. In Configuration I, the electric power first increased with increasing fouling surface charge density, reached its maximum value, and thereafter decreased. In Configuration II, the electric power first decreased with increasing fouling surface charge density, reached its minimum value, and thereafter increased. Large negative or positive charge densities of fouling contribute to the electric power and energy conversion efficiency.
期刊介绍:
Science China Technological Sciences, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research.
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