| Recycling alloy scrap and CO2 by paired molten salt electrolysis | |
| Chen, Xiang1; Zhao, Yan1; Sun, Yuan3; Wang, Long1,3; Xie, Hongwei1; Qu, Jiakang1; Gao, Shuaibo2; Wang, Dihua2; Yin, Huayi1,2 | |
| Corresponding Author | Yin, Huayi(yinhuayi@whu.edu.cn) |
| 2022-10-05 | |
| Source Publication | SUSTAINABLE ENERGY & FUELS
 |
| ISSN | 2398-4902 |
| Pages | 11 |
| Abstract | Reclaiming valuable materials from retired alloys and CO2 in an eco-friendly and efficient manner is critically important to meet the urgent need for strategical metals and curb climate change. Herein, we report a molten salt electrolyzer with an alloy scrap anode along with a CO2 reduction cathode for co-recycling alloy scrap and CO2. In molten CaCl2-NaCl-CaCO3 at 700 degrees C, the alloy scrap is converted to porous oxide scale at the anode and CO2 is reduced to carbon at the cathode. The Cl- in the molten salt prevents the passivation and allows the continuous oxidation of the alloy scrap anode, and CO32- was electrochemically reduced to provide O2- while generating carbon. The average particle size of the anode oxides is about 8 mu m and the cathode carbon is amorphous structure. Furthermore, the obtained oxides can be converted to water-soluble sulfates by sulfation roasting with recovery rates of over 92% for both Co and Ni. More importantly, the paired electrolysis method improves energy efficiency by repurposing both waste alloy scrap and CO2. This paper provides a promising and green strategy to recover valuable metals from various alloy scrap and C/CO from carbon dioxide to close both metal and carbon cycles. |
| Funding Organization | Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China |
| DOI | 10.1039/d2se00893a |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Fundamental Research Funds for the Central Universities[N2025035] ; Fundamental Research Funds for the Central Universities[N2025034] ; National Natural Science Foundation of China[52031008] ; National Natural Science Foundation of China[21673162] |
| WOS Research Area | Chemistry ; Energy & Fuels ; Materials Science |
| WOS Subject | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000864272400001 |
| Publisher | ROYAL SOC CHEMISTRY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/176125 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yin, Huayi |
| Affiliation | 1.Northeastern Univ, Sch Met, Key Lab Ecol Met Multimetall Mineral, Minist Educ, Shenyang 110819, Peoples R China 2.Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Chen, Xiang,Zhao, Yan,Sun, Yuan,et al. Recycling alloy scrap and CO2 by paired molten salt electrolysis[J]. SUSTAINABLE ENERGY & FUELS,2022:11. |
| APA | Chen, Xiang.,Zhao, Yan.,Sun, Yuan.,Wang, Long.,Xie, Hongwei.,...&Yin, Huayi.(2022).Recycling alloy scrap and CO2 by paired molten salt electrolysis.SUSTAINABLE ENERGY & FUELS,11. |
| MLA | Chen, Xiang,et al."Recycling alloy scrap and CO2 by paired molten salt electrolysis".SUSTAINABLE ENERGY & FUELS (2022):11. |
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