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Upcycling Waste Plastics into Multi-Walled Carbon Nanotube Composites via NiCo₂O₄ Catalytic Pyrolysis

Liu, Xingmin ; Xie, Wenjie ; Widenmeyer, Marc ; Ding, Hui ; Chen, Guoxing ; De Carolis, Dario M. ; Lakus-Wollny, Kerstin ; Molina-Luna, Leopoldo ; Riedel, Ralf ; Weidenkaff, Anke (2022):
Upcycling Waste Plastics into Multi-Walled Carbon Nanotube Composites via NiCo₂O₄ Catalytic Pyrolysis. (Publisher's Version)
In: Catalysts, 11 (11), MDPI, e-ISSN 2073-4344,
DOI: 10.26083/tuprints-00021165,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Upcycling Waste Plastics into Multi-Walled Carbon Nanotube Composites via NiCo₂O₄ Catalytic Pyrolysis
Language: English
Abstract:

In this work, multi-walled carbon nanotube composites (MWCNCs) were produced by catalytic pyrolysis of post-consumer plastics with aluminium oxide-supported nickel, cobalt, and their bimetallic (Ni/α–Al₂O₃, Co/α–Al₂O₃, and NiCo/α–Al₂O₃) oxide-based catalysts. The influence of catalyst composition and catalytic reaction temperature on the carbon yield and structure of CNCs were investigated. Different temperatures (800, 900, 950, and 1000°C) and catalyst compositions (Ni, Co, and Ni/Co) were explored to maximize the yield of carbon deposited on the catalyst. The obtained results showed that at the same catalytic temperature (900°C), a Ni/Co bimetallic catalyst exhibited higher carbon yield than the individual monometallic catalysts due to a better cracking capability on carbon-hydrogen bonds. With the increase of temperature, the carbon yield of the Ni/Co bimetallic catalyst increased first and then decreased. At a temperature of 950°C, the Ni/Co bimetallic catalyst achieved its largest carbon yield, which can reach 255 mg g⁻¹ plastic. The growth of CNCs followed a “particle-wire-tube” mechanism for all studied catalysts. This work finds the potential application of complex oxide composite material catalysts for the generation of CNCs in catalytic pyrolysis of wasted plastic.

Journal or Publication Title: Catalysts
Volume of the journal: 11
Issue Number: 11
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 17 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 20 Apr 2022 12:28
Last Modified: 23 Aug 2022 07:28
DOI: 10.26083/tuprints-00021165
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-211650
Additional Information:

Keywords: wasted plastic; carbon nanotube composites; Ni/Co catalyst; “particle-wire-tube” mechanism

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21165
PPN: 494175788
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