Spent hydrogenation catalysts (HDCs) contain many Mo, V, Co, Ni, and AlO 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 AlO carriers in the hydrometallurgical process was clarified.
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| http://dx.doi.org/10.1016/j.scitotenv.2024.176127 | DOI Listing |
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