Seawater desalination by over-potential membrane capacitive deionization: Opportunities and hurdles
文献类型:期刊论文
作者 | Tang, Kexin1,2,3; Kim, Yong-ha1,4; Chang, Junjun3; Mayes, Richard T.5; Gabitto, Jorge6; Yiacoumi, Sotira1; Tsouris, Costas1,5 |
刊名 | CHEMICAL ENGINEERING JOURNAL |
出版日期 | 2019-02-01 |
卷号 | 357页码:103-111 |
ISSN号 | 1385-8947 |
关键词 | Membrane capacitive deionization Over-potential Seawater desalination Mesoporous carbon Carbon aerogel |
DOI | 10.1016/j.cej.2018.09.121 |
英文摘要 | The salt removal capacity (SRC) of the carbon electrodes in membrane capacitive deionization (MCDI) is limited by the applied potential ( < 1.6 V). Thus, enhancement of the SRC is essential before applying MCDI to seawater desalination. This study aims at developing a novel MCDI system for seawater desalination by applying overpotential (OP) to enhance ion-adsorption capacity and kinetics, and by reversing the polarity (RP) of electrodes to improve ion-desorption kinetics (hereafter named OP-MCDI-RP) for seawater desalination. At 2.4 V, the OPMCDI system with mesoporous carbon demonstrated a SRC value of 64.7 mg g(-1) when desalting 0.5 M NaCl solution, while the OP-CDI system could only remove 8.2 mg g(-1) under identical conditions. Similarly, an OP-MCDI cell using carbon aerogel demonstrated a greater SRC value of 43.4 mg g(-1 )in comparison with 12.5 mg g(-1) achieved in OP-CDI. These results indicate that the OP-MCDI system can directly desalt high salinity water regardless of the electrode material. In contrast to the OP-MCDI system, the OP-MCDI-RP system yields a higher regeneration efficiency by applying a reversed low-voltage. It is shown that, under appropriate operating conditions, the OP-MCDI-RP system reduced the electrical conductivity of a seawater sample of 37 practical salinity units by 99.9%, suggesting that the OP-MCDI-RP system can be employed for seawater desalination. Due to the dramatic increase in energy demand and insufficient long-term stability caused by high potential and high salt concentration, however, the OP-MCDI-RP process should be further investigated for potential practical applications. |
WOS关键词 | ION-EXCHANGE MEMBRANES ; WATER DESALINATION ; CARBON ELECTRODES ; POROUS CARBON ; WASTE-WATER ; CHARGE EFFICIENCY ; MESOPOROUS CARBON ; FLOW-ELECTRODE ; DOUBLE-LAYER ; VOLTAGE |
资助项目 | U.S. Department of Energy[DE-AC05-00OR22725] ; Laboratory Directed Research and Development program of ORNL ; China Scholarship Council (CSC)[201606250079] ; Department of Energy |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE SA |
WOS记录号 | WOS:000448181000011 |
资助机构 | U.S. Department of Energy ; Laboratory Directed Research and Development program of ORNL ; China Scholarship Council (CSC) ; Department of Energy |
源URL | [http://ir.ipe.ac.cn/handle/122111/26452] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Tsouris, Costas |
作者单位 | 1.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA 2.Tianjin Univ, Natl Engn Res Ctr Distillat Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Div Environm Technol & Engn, Beijing 100190, Peoples R China 4.Louisiana State Univ, Dept Environm Sci, Baton Rouge, LA 70803 USA 5.Oak Ridge Natl Lab, POB 2009, Oak Ridge, TN 37831 USA 6.Prairie View A&M Univ, Dept Chem Engn, Prairie View, TX 77446 USA |
推荐引用方式 GB/T 7714 | Tang, Kexin,Kim, Yong-ha,Chang, Junjun,et al. Seawater desalination by over-potential membrane capacitive deionization: Opportunities and hurdles[J]. CHEMICAL ENGINEERING JOURNAL,2019,357:103-111. |
APA | Tang, Kexin.,Kim, Yong-ha.,Chang, Junjun.,Mayes, Richard T..,Gabitto, Jorge.,...&Tsouris, Costas.(2019).Seawater desalination by over-potential membrane capacitive deionization: Opportunities and hurdles.CHEMICAL ENGINEERING JOURNAL,357,103-111. |
MLA | Tang, Kexin,et al."Seawater desalination by over-potential membrane capacitive deionization: Opportunities and hurdles".CHEMICAL ENGINEERING JOURNAL 357(2019):103-111. |
入库方式: OAI收割
来源:过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。