Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters
| Autor: | Eugeniu Vasile, Florentina Iuliana Maxim, Serban N. Stamatin, Cornelia Diac, Radu Tirca, Adrian Ciocanea, Valeriu Filip |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Inorganic chemistry chemistry.chemical_element 02 engineering and technology recycling Electrochemistry 01 natural sciences Chloride Catalysis law.invention law medicine General Materials Science Spectroscopy Dissolution lcsh:Mining engineering. Metallurgy 010405 organic chemistry Chemistry Metals and Alloys platinum group metals Platinum group 021001 nanoscience & nanotechnology spent catalytic converters 0104 chemical sciences electrochemistry Catalytic converter 0210 nano-technology Platinum medicine.drug |
| Zdroj: | Metals Volume 10 Issue 6 Metals, Vol 10, Iss 822, p 822 (2020) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met10060822 |
| Popis: | Platinum group metals (PGMs: Pt, Pd, and Rh) are used extensively by the industry, while the natural resources are limited. The PGM concentration in spent catalytic converters is 100 times larger than in natural occurring ores. Traditional PGM methods use high temperature furnaces and strong oxidants, thus polluting the environment. Electrochemical studies showed that platinum can be converted to their chloride form. The amount of dissolved PGM was monitored by inductively coupled plasma-optical emission spectroscopy and the structure was identified by ultraviolet-visible spectroscopy. An electrochemistry protocol was designed to maximize platinum dissolution, which was then used for a spent catalytic converter. A key finding is the use of potential step that enhances the dissolution rate by a factor of 4. Recycling rates as high as 50% were achieved in 24 h without any pretreatment of the catalyst. The method developed herein is part of a current need to make the PGM recycling process more sustainable. |
| Databáze: | OpenAIRE |
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