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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.
In: Catalysts, 2022, 11 (11)
doi: 10.26083/tuprints-00021165
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Upcycling Waste Plastics into Multi-Walled Carbon Nanotube Composites via NiCo₂O₄ Catalytic Pyrolysis
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Catalysts
Volume of the journal: 11
Issue Number: 11
Collation: 17 Seiten
DOI: 10.26083/tuprints-00021165
Corresponding Links:
Origin: Secondary publication via sponsored Golden Open Access
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.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-211650
Additional Information:

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

Classification DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau
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
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21165
PPN: 494175788
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