Recycling alloy scrap and CO2 by paired molten salt electrolysis

doi:10.1039/d2se00893a

IMR OpenIR

	Recycling alloy scrap and CO2 by paired molten salt electrolysis
	Chen, Xiang 1; Zhao, Yan 1; Sun, Yuan 3; Wang, Long 1,3; Xie, Hongwei 1; Qu, Jiakang 1; Gao, Shuaibo 2; Wang, Dihua 2; Yin, Huayi 1,2
通讯作者	Yin, Huayi(yinhuayi@whu.edu.cn)
	2022-10-05
发表期刊	SUSTAINABLE ENERGY & FUELS
ISSN	2398-4902
页码	11
摘要	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.
资助者	Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China
DOI	10.1039/d2se00893a
收录类别	SCI
语种	英语
资助项目	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研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000864272400001
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176125
专题	中国科学院金属研究所
通讯作者	Yin, Huayi
作者单位	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
推荐引用方式 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.