| Title |
Recovering precious metals from proton exchange membrane fuel cells for catalytic application in the thermo-chemical processing of plastic waste |
| ID_Doc |
6279 |
| Authors |
Choi, D; Kwon, D; Nam, J; Tsang, YF; Jung, SY; Kwon, K; Kwon, EE |
| Title |
Recovering precious metals from proton exchange membrane fuel cells for catalytic application in the thermo-chemical processing of plastic waste |
| Year |
2024 |
| Published |
|
| DOI |
10.1016/j.cej.2024.149251 |
| Abstract |
Platinum (Pt) serves as a catalyst in proton -exchange membrane fuel cell (PEMFC). Owing to its value, recovery of Pt from PEMFC was motivated. Pt was retrieved as a Pt/C composite through the pyrolysis of a mixed matrix of a membrane electrode assembly (MEA) and a sub -gasket (SG), as part of an environmentally benign methodology. The Pt/C composite was harnessed as a catalyst for the pyrolysis of polypropylene (PP) using CO2 as the reaction medium. Both the one- and two -stage pyrolysis of PP yielded hydrocarbons (HCs) with methyl groups. However, the efficacy of CO2 remains inconclusive for both processes. Upon integration of Pt/C as a catalyst in PP pyrolysis, the chemical species were altered. The major constituents were 4-methylheptane, 2,4-dimethylheptane, p-xylene, and mesitylene. Catalytic pyrolysis of PP using CO2 over a Pt/C composite led to an increased formation of syngas, particularly CO, which is ascribed to the gas -phase interaction between CO2 and volatile matters (VMs) originating from PP. This study demonstrates that the use of a Pt/C composite as a catalyst in the pyrolysis of PP holds promise for the enhanced syngas generation, presenting a prospective avenue for more sustainable and efficient processes. |
| Author Keywords |
Circular economy; Proton exchange membrane fuel cell; Platinum; Thermo-chemical process; Carbon dioxide |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001180721100001 |
| WoS Category |
Engineering, Environmental; Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
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