Recovery technology of spent hydrogenation catalysts -A review

Spent hydrogenation catalysts (HDCs) contain many Mo, V, Co, Ni, and Al2O3 carriers, which are valuable secondary resources. However, improper disposal can also lead to environmental pollution risks. In the past decade, research reviews on the recovery of valuable metals from spent HDCs have been so...

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Bibliographic Details
Published in:The Science of the total environment 2024-11, Vol.953, p.176127, Article 176127
Main Authors: Zhao, Lijuan, Zhang, Xiaoguang, Tan, Zhe, Jiang, Guosai, Chen, Yousheng, Pan, De'an
Format: Article
Language:English
Subjects:
Furnace optimization
Mild leaching agents
Spent hydrogenation catalysts (HDCs)
Valuable metals
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Summary:Spent hydrogenation catalysts (HDCs) contain many Mo, V, Co, Ni, and Al2O3 carriers, which are valuable secondary resources. However, improper disposal can also lead to environmental pollution risks. In the past decade, research reviews on the recovery of valuable metals from spent HDCs have been somewhat reported, mainly summarizing basic technical processes. Based on previous work, this article reviews the emerging recycling technologies of spent HDCs in recent years. The research trend of furnace optimization in the pyrometallurgical process was innovatively proposed, and the importance of developing new mild leaching agents for the high-quality recycling of Al2O3 carriers in the hydrometallurgical process was clarified. [Display omitted] •Boiling furnace roasting is conducive to full oxidative conversion.•The retention and reuse of Al2O3 carriers should be concerned.•Green and mild reagent is beneficial for the retention of Al2O3 carriers.
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2024.176127