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Auto catalysts that have been discussed hold significant amounts of platinum-group metals such as platinum, palladium, and rhodium, depending on the specific type of catalyst. This makes them a potential reservoir of these precious metals. This discussion aims to introduce individuals to catalysts in a broader context, including their historical significance and, importantly, the potential methods for extracting and utilizing these noble metals further. The article primarily delves into the theoretical aspects of processing spent catalysts, exploring both pyrometallurgical and hydrometallurgical techniques. Platinum-group metals (PGM) are exceptionally rare and notoriously difficult to acquire elements on our planet, presenting a significant risk of potential supply shortages. Despite this, their importance remains paramount for both the European Union (EU) and the automotive sector. It's important to note that not every catalyst used in the market can be effectively recycled, primarily due to the absence of these valuable metal components.
Keywords: Precious metals, catalyst, recycling, PGM© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.