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Cited by 43Polymer Science and PVCCarbon Nanotubes in CompositesThermochemical Biomass Conversion Processes

Preparation of carbon nanotubes by catalytic pyrolysis of dechlorinated PVC

Ma, Wanli, Zhu, Yuting, Cai, Ning, Wang, Xianhua, Chen, Yingquan, Yang, Haiping, Chen, Hanping·2023·Waste Management
DOI 10.1016/j.wasman.2023.06.034
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Abstract

Plastic waste is attracting growing interest for its utilization potential as a valuable resource. However, conventional thermochemical methods can hardly achieve high-value utilization of certain plastics, such as polyvinyl chloride (PVC) characterized with high chlorine content. Here, a low-temperature aerobic pretreatment method was introduced to realize high-efficiency dechlorination of PVC, and then the dechlorinated PVC was used to prepare carbon nanotubes (CNTs) by a catalytic pyrolysis. The results demonstrate that oxygen can significantly promote the HCl release in a pretty low-temperature range (260-340 °C). Chlorine was almost completely eliminated at 280 °C under 20 % oxygen concentration. Compared to untreated PVC, using the dechlorinated PVC as raw material, higher carbon deposition was obtained and over 60 % CNTs could be collected from the carbon deposition. This study provides a high-value utilization way for the production of CNTs from waste PVC.

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  • The graphitization degree of these CNTs surpassed that of CNTs derived from traditional PP and HIPS.

    “The graphitization degree of these CNTs surpassed that of CNTs derived from traditional PP and HIPS.”

    From Functional carbon materials from waste plastics: synthesis and applications (2025) · cites this paper as [68]

  • Subsequent catalytic pyrolysis of the oxygen-enriched carbon intermediate over an FeAl2O4 catalyst achieves over 60% selectivity towards carbon nanotubes (CNTs).

    “Subsequent catalytic pyrolysis of this oxygen-enriched carbon intermediate over an FeAl 2 O 4 catalyst achieved over 60% selectivity towards carbon nanotubes (CNTs).”

    From Functional carbon materials from waste plastics: synthesis and applications (2025) · cites this paper as [68]

  • Low-temperature aerobic pretreatment at 260-340 °C with controlled oxygen concentration (optimum 20%) achieves >99% chlorine removal via selective dechlorination reactions.

    “Operating in the low-temperature range of 260-340 °C with controlled oxygen concentration (optimum 20%), this process achieved > 99% chlorine removal via selective dechlorination reactions [68] .”

    From Functional carbon materials from waste plastics: synthesis and applications (2025) · cites this paper as [68]

  • The pretreatment simultaneously facilitates directional conversion of chlorine-containing functional groups (C-Cl, -CH2-CHCl-) in the solid product to oxygen-containing groups (C=O, RCHO).

    “Simultaneously, it facilitated the directional conversion of chlorine-containing functional groups (C-Cl, -CH 2 -CHCl-) in the solid product to oxygen-containing groups (C=O, RCHO).”

    From Functional carbon materials from waste plastics: synthesis and applications (2025) · cites this paper as [68]

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Authors
Ma, W., Zhu, Y., Cai, N., Wang, X., Chen, Y., Yang, H., & Chen, H.
Affiliations
State Key Laboratory of Coal Combustion (CN)
Corresponding author
Wang, Xianhua
ORCID
Venue
Waste Management
Publisher
Elsevier BV
Published
2023-09
Volume
169
Pages
62-69
ISSN
0956-053X (ISSN-L)
DOI
10.1016/j.wasman.2023.06.034
OpenAlex
W4383162989
Cited by
43
References
43
Citations by year
2026: 6 · 2025: 19 · 2024: 16 · 2023: 2
FWCI
3.26
Type
journal article
Language
en
Open access
closed
Licence
Locations
  • Waste Management (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China (52125601)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer Science and PVC
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
Keywords
carbon nanotubes, polyvinyl chloride, plastic waste, dechlorination, catalytic pyrolysis, oxygen promotion, HCl release, carbon deposition, waste plastic recycling
MeSH terms
Pyrolysis, Chlorine, Cold Temperature, Plastics, Polyvinyl Chloride, Nanotubes, Carbon

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