Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters
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 oxidant...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-06-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/10/6/822 |
| id |
doaj-c53b6c87a38b4bfc8a1ca61c335692fe |
|---|---|
| record_format |
Article |
| spelling |
doaj-c53b6c87a38b4bfc8a1ca61c335692fe2020-11-25T03:06:25ZengMDPI AGMetals2075-47012020-06-011082282210.3390/met10060822Electrochemical Recycling of Platinum Group Metals from Spent Catalytic ConvertersCornelia Diac0Florentina I. Maxim1Radu Tirca2Adrian Ciocanea3Valeriu Filip4Eugeniu Vasile5Serban N. Stamatin63Nano-SAE Research Centre, University of Bucharest, Bucharest 077125, Romania3Nano-SAE Research Centre, University of Bucharest, Bucharest 077125, RomaniaFaculty of Physics, University of Bucharest, Bucharest 077125, RomaniaPower Engineering Faculty; Hydraulics, Hydraulic Machines, and Environmental Engineering Department, University “Politehnica” of Bucharest, Bucharest 060042, RomaniaFaculty of Physics, University of Bucharest, Bucharest 077125, RomaniaDepartment of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Material Science, University “Politehnica” of Bucharest, Bucharest 060042, Romania3Nano-SAE Research Centre, University of Bucharest, Bucharest 077125, RomaniaPlatinum 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.https://www.mdpi.com/2075-4701/10/6/822platinum group metalsrecyclingspent catalytic converterselectrochemistry |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Cornelia Diac Florentina I. Maxim Radu Tirca Adrian Ciocanea Valeriu Filip Eugeniu Vasile Serban N. Stamatin |
| spellingShingle |
Cornelia Diac Florentina I. Maxim Radu Tirca Adrian Ciocanea Valeriu Filip Eugeniu Vasile Serban N. Stamatin Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters Metals platinum group metals recycling spent catalytic converters electrochemistry |
| author_facet |
Cornelia Diac Florentina I. Maxim Radu Tirca Adrian Ciocanea Valeriu Filip Eugeniu Vasile Serban N. Stamatin |
| author_sort |
Cornelia Diac |
| title |
Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters |
| title_short |
Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters |
| title_full |
Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters |
| title_fullStr |
Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters |
| title_full_unstemmed |
Electrochemical Recycling of Platinum Group Metals from Spent Catalytic Converters |
| title_sort |
electrochemical recycling of platinum group metals from spent catalytic converters |
| publisher |
MDPI AG |
| series |
Metals |
| issn |
2075-4701 |
| publishDate |
2020-06-01 |
| description |
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. |
| topic |
platinum group metals recycling spent catalytic converters electrochemistry |
| url |
https://www.mdpi.com/2075-4701/10/6/822 |
| work_keys_str_mv |
AT corneliadiac electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters AT florentinaimaxim electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters AT radutirca electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters AT adrianciocanea electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters AT valeriufilip electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters AT eugeniuvasile electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters AT serbannstamatin electrochemicalrecyclingofplatinumgroupmetalsfromspentcatalyticconverters |
| _version_ |
1724674266813693952 |