Quantifying the flow efficiency in constant-current capacitive deionization.
作者： Steven A. Hawks , Jennifer M. Knipe , Patrick G. Campbell , Colin K. Loeb , McKenzie A. Hubert
DOI: 10.1016/J.WATRES.2017.11.025
关键词:
摘要: Abstract Here we detail a previously unappreciated loss mechanism inherent to capacitive deionization (CDI) cycling operation that has substantial role determining performance. This reflects the fact desalinated water inside cell is partially lost re-salination if desorption carried out immediately after adsorption. We describe such effects by parameter called flow efficiency, and show this efficiency distinct from yet multiplicative with other highly-studied adsorption efficiencies. Flow losses can be minimized flowing more feed solution through during desalination; however, also results in less effluent concentration reduction. While rationale outlined here applicable all CDI architectures rely on cycling, validate our model flow-through electrode device operated constant-current mode. find excellent agreement between predictions experimental results, thus giving researchers simple equations which they estimate process for their operation.
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