Electrochemical Separation of Alkaline-Earth Elements from Molten Salts Using Liquid Metal Electrodes
Closing the nuclear fuel cycle requires recycling used nuclear fuel. Additional waste is generated during recycling due to fission products accumulating in processing salts (LiCl–KCl). Reducing the waste generated during recycling entails recovering alkaline-earth fission products (Ba2+/Sr2+) from m...
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| Veröffentlicht in: | ACS sustainable chemistry & engineering 2020-10, Vol.8 (39), p.14818-14824 |
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| creator | Nigl, Thomas P Lichtenstein, Timothy Kong, Yuran Kim, Hojong |
| description | Closing the nuclear fuel cycle requires recycling used nuclear fuel. Additional waste is generated during recycling due to fission products accumulating in processing salts (LiCl–KCl). Reducing the waste generated during recycling entails recovering alkaline-earth fission products (Ba2+/Sr2+) from molten chlorides with a minimal loss of bulk electrolyte constituents (Li+/K+). Electrochemical codeposition of Ba2+/Li+ and Sr2+/Li+ into liquid metal (Bi, Sb, Sn, and Pb) and alloy (Bi–Sb) electrodes was investigated in LiCl–KCl–(BaCl2, SrCl2) electrolytes at 500 and 650 °C. For the pure Bi (500 °C) and Sb (650 °C) electrodes, the greatest percentage of charge was used to deposit Ba and Sr. Effective recovery of Ba/Sr by liquid Bi and Sb electrodes is supported via experimentally determined activity values of Ba/Sr in Bi and Sb. Alloying Sb with Bi increased Ba recovery but decreased Sr recovery, compared to the recovery using a liquid Bi electrode. The results suggest that alkaline-earth fission products can be recovered from molten chlorides using liquid metal electrodes via electrochemical separation, thereby providing a method to reduce the generation of nuclear waste from nuclear fuel recycling. |
| doi_str_mv | 10.1021/acssuschemeng.0c04249 |
| format | Article |
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Additional waste is generated during recycling due to fission products accumulating in processing salts (LiCl–KCl). Reducing the waste generated during recycling entails recovering alkaline-earth fission products (Ba2+/Sr2+) from molten chlorides with a minimal loss of bulk electrolyte constituents (Li+/K+). Electrochemical codeposition of Ba2+/Li+ and Sr2+/Li+ into liquid metal (Bi, Sb, Sn, and Pb) and alloy (Bi–Sb) electrodes was investigated in LiCl–KCl–(BaCl2, SrCl2) electrolytes at 500 and 650 °C. For the pure Bi (500 °C) and Sb (650 °C) electrodes, the greatest percentage of charge was used to deposit Ba and Sr. Effective recovery of Ba/Sr by liquid Bi and Sb electrodes is supported via experimentally determined activity values of Ba/Sr in Bi and Sb. Alloying Sb with Bi increased Ba recovery but decreased Sr recovery, compared to the recovery using a liquid Bi electrode. 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Eng</addtitle><description>Closing the nuclear fuel cycle requires recycling used nuclear fuel. Additional waste is generated during recycling due to fission products accumulating in processing salts (LiCl–KCl). Reducing the waste generated during recycling entails recovering alkaline-earth fission products (Ba2+/Sr2+) from molten chlorides with a minimal loss of bulk electrolyte constituents (Li+/K+). Electrochemical codeposition of Ba2+/Li+ and Sr2+/Li+ into liquid metal (Bi, Sb, Sn, and Pb) and alloy (Bi–Sb) electrodes was investigated in LiCl–KCl–(BaCl2, SrCl2) electrolytes at 500 and 650 °C. For the pure Bi (500 °C) and Sb (650 °C) electrodes, the greatest percentage of charge was used to deposit Ba and Sr. Effective recovery of Ba/Sr by liquid Bi and Sb electrodes is supported via experimentally determined activity values of Ba/Sr in Bi and Sb. Alloying Sb with Bi increased Ba recovery but decreased Sr recovery, compared to the recovery using a liquid Bi electrode. The results suggest that alkaline-earth fission products can be recovered from molten chlorides using liquid metal electrodes via electrochemical separation, thereby providing a method to reduce the generation of nuclear waste from nuclear fuel recycling.</description><subject>Alkaline-earth metals</subject><subject>Alloys</subject><subject>Electrochemical separations</subject><subject>Electrolysis</subject><subject>Electrorefining</subject><subject>Liquid metal electrodes</subject><subject>Liquid metals</subject><subject>Liquids</subject><subject>Molten salts</subject><subject>Nuclear fuel cycle</subject><subject>NUCLEAR FUEL CYCLE AND FUEL MATERIALS</subject><subject>Used nuclear fuel recycling</subject><issn>2168-0485</issn><issn>2168-0485</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFUE1PwzAMjRBITLCfgBRx70japm2O0zQ-pE0cxs6Rm7pbRpeMJDvw78m0HeCEL7bs957tR8gDZxPOcv4EOoRj0Fvco91MmGZlXsorMsp51WSsbMT1r_qWjEPYsRRSFnnDRwTnA-ro3UnAaBjoCg_gIRpnqevpdPiEwVjM5uDjliZwWhMD7b3b06UbIlq6giF11sHYDV2Yr6Pp6BJjkrpIdxjuyU0PQ8DxJd-R9fP8Y_aaLd5f3mbTRQZFJWMGrSylAOQ512Wpsa15J5oWWym4YKJsJMO6r7ToZSNbgKrua9nUIKtaoOyguCOPZ10XolFBm4h6q5216RDFKyHzqkggcQZp70Lw2KuDN3vw34ozdfJU_fFUXTxNPH7mpbHauaO36ZV_OD9w3YBp</recordid><startdate>20201005</startdate><enddate>20201005</enddate><creator>Nigl, Thomas P</creator><creator>Lichtenstein, Timothy</creator><creator>Kong, Yuran</creator><creator>Kim, Hojong</creator><general>American Chemical Society</general><general>American Chemical Society (ACS)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OIOZB</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-6247-3474</orcidid><orcidid>https://orcid.org/0000-0001-8641-392X</orcidid><orcidid>https://orcid.org/0000-0002-4739-9907</orcidid><orcidid>https://orcid.org/0000-0002-0362-9950</orcidid><orcidid>https://orcid.org/0000000247399907</orcidid><orcidid>https://orcid.org/0000000203629950</orcidid><orcidid>https://orcid.org/000000018641392X</orcidid><orcidid>https://orcid.org/0000000262473474</orcidid></search><sort><creationdate>20201005</creationdate><title>Electrochemical Separation of Alkaline-Earth Elements from Molten Salts Using Liquid Metal Electrodes</title><author>Nigl, Thomas P ; Lichtenstein, Timothy ; Kong, Yuran ; Kim, Hojong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a369t-ab9495ae121c44ceb71d58beb9515054890e7f6c5f989baa67f7987a9675e9da3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Alkaline-earth metals</topic><topic>Alloys</topic><topic>Electrochemical separations</topic><topic>Electrolysis</topic><topic>Electrorefining</topic><topic>Liquid metal electrodes</topic><topic>Liquid metals</topic><topic>Liquids</topic><topic>Molten salts</topic><topic>Nuclear fuel cycle</topic><topic>NUCLEAR FUEL CYCLE AND FUEL MATERIALS</topic><topic>Used nuclear fuel recycling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nigl, Thomas P</creatorcontrib><creatorcontrib>Lichtenstein, Timothy</creatorcontrib><creatorcontrib>Kong, Yuran</creatorcontrib><creatorcontrib>Kim, Hojong</creatorcontrib><creatorcontrib>Pennsylvania State Univ., University Park, PA (United States)</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>ACS sustainable chemistry & engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nigl, Thomas P</au><au>Lichtenstein, Timothy</au><au>Kong, Yuran</au><au>Kim, Hojong</au><aucorp>Pennsylvania State Univ., University Park, PA (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electrochemical Separation of Alkaline-Earth Elements from Molten Salts Using Liquid Metal Electrodes</atitle><jtitle>ACS sustainable chemistry & engineering</jtitle><addtitle>ACS Sustainable Chem. Eng</addtitle><date>2020-10-05</date><risdate>2020</risdate><volume>8</volume><issue>39</issue><spage>14818</spage><epage>14824</epage><pages>14818-14824</pages><issn>2168-0485</issn><eissn>2168-0485</eissn><abstract>Closing the nuclear fuel cycle requires recycling used nuclear fuel. Additional waste is generated during recycling due to fission products accumulating in processing salts (LiCl–KCl). Reducing the waste generated during recycling entails recovering alkaline-earth fission products (Ba2+/Sr2+) from molten chlorides with a minimal loss of bulk electrolyte constituents (Li+/K+). Electrochemical codeposition of Ba2+/Li+ and Sr2+/Li+ into liquid metal (Bi, Sb, Sn, and Pb) and alloy (Bi–Sb) electrodes was investigated in LiCl–KCl–(BaCl2, SrCl2) electrolytes at 500 and 650 °C. 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| subjects | Alkaline-earth metals Alloys Electrochemical separations Electrolysis Electrorefining Liquid metal electrodes Liquid metals Liquids Molten salts Nuclear fuel cycle NUCLEAR FUEL CYCLE AND FUEL MATERIALS Used nuclear fuel recycling |
| title | Electrochemical Separation of Alkaline-Earth Elements from Molten Salts Using Liquid Metal Electrodes |
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