当前位置: X-MOL 学术ACS Sustain. Chem. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Rocking-Chair Capacitive Deionization for Continuous Brackish Water Desalination
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-06 00:00:00 , DOI: 10.1021/acssuschemeng.8b02123
Jaehan Lee , Kyusik Jo , Jiho Lee , Sung Pil Hong , Seonghwan Kim , Jeyong Yoon

Capacitive deionization (CDI) is considered an alternative desalination technology due to its easy operation, high energy efficiency, and environmentally friendly process. However, a separate regeneration step is required in typical CDI technologies that releases the absorbed ions on the electrodes which results in an inefficient and cost-intensive process. This study proposed a novel CDI system referred to as rocking-chair capacitive deionization (RCDI) that has a continuous brackish water desalination process which consists of a pair of Nafion-coated activated carbon electrodes and an anion-exchange membrane. The coated Nafion contributed to the cation selectivity of the carbon electrode, and it enabled a continuous desalination process during constant-current operation through a rocking-chair ion movement. From the desalination tests that included the analysis of the CDI Ragone plot, the RCDI has a high salt adsorption capacity (maximum of 44.5 mg g–1) with continuous operation. Furthermore, the RCDI desalted brackish water under rapid operation conditions (up to ±30.0 A m–2) which is a constant-current operation condition that is several times higher than that of previously reported desalination technologies using battery materials. Consequently, this study proposes a new strategy for a continuous desalination CDI system that provides a high-performance and energy-efficient desalination process for brackish water.

中文翻译:

摇椅电容去离子连续微咸水淡化

电容去离子(CDI)由于其易于操作,高能效和环保工艺而被认为是一种替代性的脱盐技术。但是,典型的CDI技术需要单独的再生步骤,该步骤会释放电极上吸收的离子,从而导致效率低下和成本密集的过程。这项研究提出了一种称为摇椅电容去离子(RCDI)的新型CDI系统,该系统具有连续的微咸水淡化过程,该过程由一对涂有Nafion的活性炭电极和阴离子交换膜组成。涂覆的Nafion有助于碳电极的阳离子选择性,并且它通过摇椅离子运动在恒流操作过程中实现了连续的脱盐过程。–1)连续运行。此外,RCDI在快速运行条件(高达±30.0 A m –2)下使微咸水脱盐,该条件是恒定电流运行条件,比先前报道的使用电池材料的脱盐技术高出几倍。因此,本研究提出了一种用于连续淡化CDI系统的新策略,该系统可为微咸水提供高性能和高能效的淡化工艺。
更新日期:2018-07-06
down
wechat
bug