Enhanced salt removal performance of flow electrode capacitive deionization with high cell operational potential
[Display omitted] •Flow electrode capacitive deionization operated in the range 1.2 to 4.5 V.•Salt removal efficiency and removal rate increase with higher operational potential difference.•No noticeable electrode reactions or water electrolysis were observed up to 2.5 V. Capacitive deionization (CD...
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| Veröffentlicht in: | Separation and purification technology 2021-01, Vol.254, p.117500, Article 117500 |
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| container_title | Separation and purification technology |
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| creator | Ha, Yuncheol Lee, Hyejeong Yoon, Hana Shin, Dongwon Ahn, Wook Cho, Namchul Han, Uiyoung Hong, Jinkee Anh Thu Tran, Nguyen Yoo, Chung-Yul Kang, Hong Suk Cho, Younghyun |
| description | [Display omitted]
•Flow electrode capacitive deionization operated in the range 1.2 to 4.5 V.•Salt removal efficiency and removal rate increase with higher operational potential difference.•No noticeable electrode reactions or water electrolysis were observed up to 2.5 V.
Capacitive deionization (CDI) is an emerging technology with great potential to be energy efficient and allow cost-effective operation for the removal of salt ions from saline water. The introduction of flow electrode to CDI greatly enhanced the salt removal performance at much higher salt concentration, even at seawater level, due to not needing a discharging process, which is required for conventional CDI desalination. Since the oxidation of carbon electrodes and water electrolysis leads to the decrease in desalination performance and long-term stability of the CDI cell, it has typically been operated at the potential difference |
| doi_str_mv | 10.1016/j.seppur.2020.117500 |
| format | Article |
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•Flow electrode capacitive deionization operated in the range 1.2 to 4.5 V.•Salt removal efficiency and removal rate increase with higher operational potential difference.•No noticeable electrode reactions or water electrolysis were observed up to 2.5 V.
Capacitive deionization (CDI) is an emerging technology with great potential to be energy efficient and allow cost-effective operation for the removal of salt ions from saline water. The introduction of flow electrode to CDI greatly enhanced the salt removal performance at much higher salt concentration, even at seawater level, due to not needing a discharging process, which is required for conventional CDI desalination. Since the oxidation of carbon electrodes and water electrolysis leads to the decrease in desalination performance and long-term stability of the CDI cell, it has typically been operated at the potential difference < 1.2 V. However, due to the various resistances of CDI components, it is known that the electrode potential is lower than the applied cell potential difference. Based on such knowledge, in this study, we operated FCDI desalination at various operational potential differences from 1.2 to 4.5 V, and studied the carbon oxidation and electrochemical characteristics by FT-IR, Raman spectroscopy, and EIS measurements. Desalination efficiency and salt removal rate increase with higher operational potential difference. Our results confirmed that up to 2.5 V, no noticeable carbon oxidation and gas generation resulting from water electrolysis occurred.</description><identifier>ISSN: 1383-5866</identifier><identifier>EISSN: 1873-3794</identifier><identifier>DOI: 10.1016/j.seppur.2020.117500</identifier><language>eng</language><publisher>AMSTERDAM: Elsevier B.V</publisher><subject>Desalination ; Electrode oxidation ; Engineering ; Engineering, Chemical ; Flow electrodes capacitive deionization ; High operational potential difference ; Science & Technology ; Technology ; Water electrolysis</subject><ispartof>Separation and purification technology, 2021-01, Vol.254, p.117500, Article 117500</ispartof><rights>2020 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>38</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000580404400009</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c306t-6b1c19d91968b574e4b173fd980b28658ca496516c9f7f96cfabb0ccb99dfa23</citedby><cites>FETCH-LOGICAL-c306t-6b1c19d91968b574e4b173fd980b28658ca496516c9f7f96cfabb0ccb99dfa23</cites><orcidid>0000-0002-9175-2229</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.seppur.2020.117500$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,782,786,3554,27933,27934,39267,46004</link.rule.ids></links><search><creatorcontrib>Ha, Yuncheol</creatorcontrib><creatorcontrib>Lee, Hyejeong</creatorcontrib><creatorcontrib>Yoon, Hana</creatorcontrib><creatorcontrib>Shin, Dongwon</creatorcontrib><creatorcontrib>Ahn, Wook</creatorcontrib><creatorcontrib>Cho, Namchul</creatorcontrib><creatorcontrib>Han, Uiyoung</creatorcontrib><creatorcontrib>Hong, Jinkee</creatorcontrib><creatorcontrib>Anh Thu Tran, Nguyen</creatorcontrib><creatorcontrib>Yoo, Chung-Yul</creatorcontrib><creatorcontrib>Kang, Hong Suk</creatorcontrib><creatorcontrib>Cho, Younghyun</creatorcontrib><title>Enhanced salt removal performance of flow electrode capacitive deionization with high cell operational potential</title><title>Separation and purification technology</title><addtitle>SEP PURIF TECHNOL</addtitle><description>[Display omitted]
•Flow electrode capacitive deionization operated in the range 1.2 to 4.5 V.•Salt removal efficiency and removal rate increase with higher operational potential difference.•No noticeable electrode reactions or water electrolysis were observed up to 2.5 V.
Capacitive deionization (CDI) is an emerging technology with great potential to be energy efficient and allow cost-effective operation for the removal of salt ions from saline water. The introduction of flow electrode to CDI greatly enhanced the salt removal performance at much higher salt concentration, even at seawater level, due to not needing a discharging process, which is required for conventional CDI desalination. Since the oxidation of carbon electrodes and water electrolysis leads to the decrease in desalination performance and long-term stability of the CDI cell, it has typically been operated at the potential difference < 1.2 V. However, due to the various resistances of CDI components, it is known that the electrode potential is lower than the applied cell potential difference. Based on such knowledge, in this study, we operated FCDI desalination at various operational potential differences from 1.2 to 4.5 V, and studied the carbon oxidation and electrochemical characteristics by FT-IR, Raman spectroscopy, and EIS measurements. Desalination efficiency and salt removal rate increase with higher operational potential difference. Our results confirmed that up to 2.5 V, no noticeable carbon oxidation and gas generation resulting from water electrolysis occurred.</description><subject>Desalination</subject><subject>Electrode oxidation</subject><subject>Engineering</subject><subject>Engineering, Chemical</subject><subject>Flow electrodes capacitive deionization</subject><subject>High operational potential difference</subject><subject>Science & Technology</subject><subject>Technology</subject><subject>Water electrolysis</subject><issn>1383-5866</issn><issn>1873-3794</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>HGBXW</sourceid><recordid>eNqNkE1LAzEQhhdRsFb_gYfcZetkP7LJRZBSP6DgpfeQzU5synazZNMW_fWm3eJRPM2Qmedl8iTJPYUZBcoeN7MB-37nZxlk8YlWJcBFMqG8ytO8EsVl7HOepyVn7Dq5GYYNAK0ozyZJv-jWqtPYkEG1gXjcur1qSY_eOL89TogzxLTuQLBFHbxrkGjVK22D3SNp0LrOfqsQCznYsCZr-7kmGtuWuJhyGhwDXcAuWNXeJldGtQPenes0Wb0sVvO3dPnx-j5_XqY6BxZSVlNNRSOoYLwuqwKLmla5aQSHOuOs5FoVgpWUaWEqI5g2qq5B61qIxqgsnybFGKu9GwaPRvbebpX_khTkUZrcyFGaPEqTo7SI8RE7YO3MoC1GA78oAJQcCiiK2IGY23D63tztuhDRh_-jcftp3MboYG_RyzPRWB81y8bZvy_9AbWvm50</recordid><startdate>20210101</startdate><enddate>20210101</enddate><creator>Ha, Yuncheol</creator><creator>Lee, Hyejeong</creator><creator>Yoon, Hana</creator><creator>Shin, Dongwon</creator><creator>Ahn, Wook</creator><creator>Cho, Namchul</creator><creator>Han, Uiyoung</creator><creator>Hong, Jinkee</creator><creator>Anh Thu Tran, Nguyen</creator><creator>Yoo, Chung-Yul</creator><creator>Kang, Hong Suk</creator><creator>Cho, Younghyun</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>BLEPL</scope><scope>DTL</scope><scope>HGBXW</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-9175-2229</orcidid></search><sort><creationdate>20210101</creationdate><title>Enhanced salt removal performance of flow electrode capacitive deionization with high cell operational potential</title><author>Ha, Yuncheol ; Lee, Hyejeong ; Yoon, Hana ; Shin, Dongwon ; Ahn, Wook ; Cho, Namchul ; Han, Uiyoung ; Hong, Jinkee ; Anh Thu Tran, Nguyen ; Yoo, Chung-Yul ; Kang, Hong Suk ; Cho, Younghyun</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c306t-6b1c19d91968b574e4b173fd980b28658ca496516c9f7f96cfabb0ccb99dfa23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Desalination</topic><topic>Electrode oxidation</topic><topic>Engineering</topic><topic>Engineering, Chemical</topic><topic>Flow electrodes capacitive deionization</topic><topic>High operational potential difference</topic><topic>Science & Technology</topic><topic>Technology</topic><topic>Water electrolysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ha, Yuncheol</creatorcontrib><creatorcontrib>Lee, Hyejeong</creatorcontrib><creatorcontrib>Yoon, Hana</creatorcontrib><creatorcontrib>Shin, Dongwon</creatorcontrib><creatorcontrib>Ahn, Wook</creatorcontrib><creatorcontrib>Cho, Namchul</creatorcontrib><creatorcontrib>Han, Uiyoung</creatorcontrib><creatorcontrib>Hong, Jinkee</creatorcontrib><creatorcontrib>Anh Thu Tran, Nguyen</creatorcontrib><creatorcontrib>Yoo, Chung-Yul</creatorcontrib><creatorcontrib>Kang, Hong Suk</creatorcontrib><creatorcontrib>Cho, Younghyun</creatorcontrib><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>Web of Science - Science Citation Index Expanded - 2021</collection><collection>CrossRef</collection><jtitle>Separation and purification technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ha, Yuncheol</au><au>Lee, Hyejeong</au><au>Yoon, Hana</au><au>Shin, Dongwon</au><au>Ahn, Wook</au><au>Cho, Namchul</au><au>Han, Uiyoung</au><au>Hong, Jinkee</au><au>Anh Thu Tran, Nguyen</au><au>Yoo, Chung-Yul</au><au>Kang, Hong Suk</au><au>Cho, Younghyun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhanced salt removal performance of flow electrode capacitive deionization with high cell operational potential</atitle><jtitle>Separation and purification technology</jtitle><stitle>SEP PURIF TECHNOL</stitle><date>2021-01-01</date><risdate>2021</risdate><volume>254</volume><spage>117500</spage><pages>117500-</pages><artnum>117500</artnum><issn>1383-5866</issn><eissn>1873-3794</eissn><abstract>[Display omitted]
•Flow electrode capacitive deionization operated in the range 1.2 to 4.5 V.•Salt removal efficiency and removal rate increase with higher operational potential difference.•No noticeable electrode reactions or water electrolysis were observed up to 2.5 V.
Capacitive deionization (CDI) is an emerging technology with great potential to be energy efficient and allow cost-effective operation for the removal of salt ions from saline water. The introduction of flow electrode to CDI greatly enhanced the salt removal performance at much higher salt concentration, even at seawater level, due to not needing a discharging process, which is required for conventional CDI desalination. Since the oxidation of carbon electrodes and water electrolysis leads to the decrease in desalination performance and long-term stability of the CDI cell, it has typically been operated at the potential difference < 1.2 V. However, due to the various resistances of CDI components, it is known that the electrode potential is lower than the applied cell potential difference. Based on such knowledge, in this study, we operated FCDI desalination at various operational potential differences from 1.2 to 4.5 V, and studied the carbon oxidation and electrochemical characteristics by FT-IR, Raman spectroscopy, and EIS measurements. Desalination efficiency and salt removal rate increase with higher operational potential difference. Our results confirmed that up to 2.5 V, no noticeable carbon oxidation and gas generation resulting from water electrolysis occurred.</abstract><cop>AMSTERDAM</cop><pub>Elsevier B.V</pub><doi>10.1016/j.seppur.2020.117500</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-9175-2229</orcidid></addata></record> |
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| subjects | Desalination Electrode oxidation Engineering Engineering, Chemical Flow electrodes capacitive deionization High operational potential difference Science & Technology Technology Water electrolysis |
| title | Enhanced salt removal performance of flow electrode capacitive deionization with high cell operational potential |
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