Electrosynthesis of Titanium Alloys from Spent SCR Catalysts
Spent selective catalytic reduction (SCR) catalysts are hazardous wastes containing many valuable metals whose improper disposal can cause environmental pollution and resource waste. Therefore, it is significant to recover valuable metals from spent SCR catalysts. In this study, the molten salt elec...
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MDPI AG
2025-01-01
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| author | Long Zheng Jiahao Jin Zongying Cai Xiangpeng Li Qi Zhu Weigang Cao |
| author_facet | Long Zheng Jiahao Jin Zongying Cai Xiangpeng Li Qi Zhu Weigang Cao |
| author_sort | Long Zheng |
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| description | Spent selective catalytic reduction (SCR) catalysts are hazardous wastes containing many valuable metals whose improper disposal can cause environmental pollution and resource waste. Therefore, it is significant to recover valuable metals from spent SCR catalysts. In this study, the molten salt electrolytic method was employed to treat the SCR catalyst to direct electrosynthesis titanium alloys, which is more environmentally friendly and economical to obtain metal or alloy from secondary resources. A systematic investigation was carried out via experimental analysis and thermodynamic calculation. The results show that high-temperature pretreatment induces the aggregation of W and the formation of CaWO<sub>4</sub>. Through molten salt electrolysis, titanium alloys containing Ti(W) and Ti<sub>5</sub>Si<sub>3</sub> were formed, with a metal recovery rate of 80–87%. The electrolytic process and the reaction mechanism were also investigated. It is suggested that the molten salt electrolytic method is an effective way to recover valuable metals from spent SCR catalysts. |
| format | Article |
| id | doaj-art-1ed3524238124135a099841dceccde2d |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-1ed3524238124135a099841dceccde2d2025-01-24T13:28:14ZengMDPI AGCrystals2073-43522025-01-011518310.3390/cryst15010083Electrosynthesis of Titanium Alloys from Spent SCR CatalystsLong Zheng0Jiahao Jin1Zongying Cai2Xiangpeng Li3Qi Zhu4Weigang Cao5College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaSpent selective catalytic reduction (SCR) catalysts are hazardous wastes containing many valuable metals whose improper disposal can cause environmental pollution and resource waste. Therefore, it is significant to recover valuable metals from spent SCR catalysts. In this study, the molten salt electrolytic method was employed to treat the SCR catalyst to direct electrosynthesis titanium alloys, which is more environmentally friendly and economical to obtain metal or alloy from secondary resources. A systematic investigation was carried out via experimental analysis and thermodynamic calculation. The results show that high-temperature pretreatment induces the aggregation of W and the formation of CaWO<sub>4</sub>. Through molten salt electrolysis, titanium alloys containing Ti(W) and Ti<sub>5</sub>Si<sub>3</sub> were formed, with a metal recovery rate of 80–87%. The electrolytic process and the reaction mechanism were also investigated. It is suggested that the molten salt electrolytic method is an effective way to recover valuable metals from spent SCR catalysts.https://www.mdpi.com/2073-4352/15/1/83spent SCR catalystelectrolytic reductiontitanium alloysrecycle |
| spellingShingle | Long Zheng Jiahao Jin Zongying Cai Xiangpeng Li Qi Zhu Weigang Cao Electrosynthesis of Titanium Alloys from Spent SCR Catalysts Crystals spent SCR catalyst electrolytic reduction titanium alloys recycle |
| title | Electrosynthesis of Titanium Alloys from Spent SCR Catalysts |
| title_full | Electrosynthesis of Titanium Alloys from Spent SCR Catalysts |
| title_fullStr | Electrosynthesis of Titanium Alloys from Spent SCR Catalysts |
| title_full_unstemmed | Electrosynthesis of Titanium Alloys from Spent SCR Catalysts |
| title_short | Electrosynthesis of Titanium Alloys from Spent SCR Catalysts |
| title_sort | electrosynthesis of titanium alloys from spent scr catalysts |
| topic | spent SCR catalyst electrolytic reduction titanium alloys recycle |
| url | https://www.mdpi.com/2073-4352/15/1/83 |
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