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| Analysis of the fundamental characteristics of spent automotive catalytic converter and its effect on rare precious metal recovery |
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Received:January 15, 2024
Revised:January 15, 2024
Accepted:February 01, 2024
Published Online:March 24, 2025
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| DOI： |
| KeyWord:spent automotive catalytic converter; rare precious metals; platinum group metals; rare-earth metal; recycling |
| Author | Institution |
| Bingyin Shi |
School of Metallurgical and Materials Engineering, Jiangsu University of Science and Technology |
| Guoyu Qian |
Institute of Process Engineering, Chinese Academy of Sciences |
| Zhi Wang |
Institute of Process Engineering, Chinese Academy of Sciences |
| Hongbing Peng |
School of Metallurgical and Materials Engineering, Jiangsu University of Science and Technology |
| Zhen Wan |
School of Metallurgical and Materials Engineering, Jiangsu University of Science and Technology |
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| Abstract: |
| Automotive catalytic converters in scrapped cars are important precious metal secondary resources, and due to the increasing number of scrapped cars in the future, the amount of scrapped car catalytic converters is also increasing sharply. There are currently many methods for recycling rare precious metals (platinum group metals, rare earth metals, and other rare metals), but due to insufficient understanding of the characteristics of spent automotive catalytic converter, most recycling methods are not ideal in terms of recovery rate, environmental friendliness, and economic viability. There is an urgent need for a reliable and comprehensive scientific understanding of spent automotive catalytic converter. In this paper, we conducted a study on the fundamental characteristics, phases and component compositions, the existence form of precious metal elements such as PGMs, Ree, Zr, and the migration and distribution status, melting process of elements to comprehensively understand the spent automotive catalyst converter. The study also revealed the deactivation mechanism of spent automotive catalyst converter and the impact brought by the recovery of rare precious metals. The deactivation and retirement of catalysts are the result of factors such as partial oxidation of platinum group metals in the catalyst, migration of active components, coating burn-off and cracking, as well as contamination by impurity elements, as revealed by studies. Discuss and evaluate the impact of the basic characteristics of spent catalysts on the precious metal recovery methods. |
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