Platinum Group Metals: Green Recovery from Spent Auto-Catalysts and Reuse in New Catalysts

Platinum Group Metals: Green Recovery from Spent Auto-Catalysts and Reuse in New Catalysts—A Review

Published:2023-03-23 Issue:4 Volume:13 Page:550
ISSN:2073-4352
Container-title:Crystals
language:en
Short-container-title:Crystals

Author:

Grilli Maria Luisa¹^ORCID,Slobozeanu Anca Elena²,Larosa Claudio¹³,Paneva Daniela⁴,Yakoumis Iakovos⁵^ORCID,Cherkezova-Zheleva Zara⁴^ORCID

Affiliation:

1. Energy Technologies and Renewable Sources Department, Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Anguillarese 301, 00123 Rome, Italy

2. National R&D Institute for Nonferrous and Rare Metals—IMNR, 102 Biruintei Blvd, Pantelimon, 077145 Ilfov, Romania

3. Department of Chemical Science and Technology, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy

4. Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bldg. 11, 1113 Sofia, Bulgaria

5. MONOLITHOS Catalysts and Recycling Ltd., Vrilissou 83, 114 76 Athens, Greece

Abstract

This manuscript reviews the current trends in the recovery of Platinum Group Metals (PGMs) from end-of-life autocatalysts and the aims of the recently funded Marie Sklodowska-Curie Project “Chemistry of Platinum Group Metals-CHemPGM” towards the greening of PGMs recovery processes and the reusing of recovered PGMs for preparation of new catalysts. Together with the analysis of the state of the art recovery of PGMs from spent autocatalysts through pyrometallurgical and hydrometallurgical routes and the recent trends in reducing their environmental impact, also emerging sustainable and green technologies are analyzed. Particular focus is given on the mechanochemical processing as a promising sustainable route not only for the pretreatment of waste materials but also for direct PGMs leaching. The present review identifies also the trends in catalysts for carbon neutrality and the few recent efforts in developing PGM-based catalysts starting directly from the liquor of the leach solutions of spent catalysts envisaging therefore a possible key to close PGMs loop in a more efficient and sustainable way.

Funder

European Union’s Horizon 2020 research and innovation programme under the Marie- Skłodowska-Curie

Publisher

MDPI AG

Subject

Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering

Link

https://www.mdpi.com/2073-4352/13/4/550/pdf

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