Development of metal-doping mesoporous biochar catalyst for co-valorizing biomass and plastic waste into valuable hydrocarbons, syngas, and carbons

Ruolan Xu, Cuiqiang Yan, Quan Liu, Erwei Liu, Hehu Zhang, Xiaoxiao Zhang, Xiangru Yuan, Lujia Han, Hanwu Lei, Roger Ruan, Xuesong Zhang

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The present study was aimed to explore a cost-effective route to produce metal-doping mesoporous graphite-like catalysts, which utilized metal chlorides (ZnCl2, FeCl3, and NiCl2) to modulate biochar within mesopore-creating, metal-doping, and graphitization simultaneously accomplished in the one-step thermal process. The properties of these as-synthesized catalysts were comprehensively characterized by a sequence of analytic methods (e.g., BET, NH3-TPD, SEM, EDS, TEM, FTIR, XRD, and Raman analysis). The carbon yields and HHV of bio-oils from ex-situ catalytic fast co-pyrolysis of biomass and plastic waste over the as-synthesized catalysts were around 50C% and 43 MJ/kg, respectively. Up to 96% of selectivity toward hydrocarbons when Ni/C was used as the catalyst, of which aromatic hydrocarbons accounted for nearly 40%. On the other hand, Fe/C was in favor of the production of H2 (90 NmL/gfeedstock) and syngas (~133 NmL/gfeedstock), which respectively occupying ~44 vol% and over 64 vol% in the gas; it also favored the generation of carbon nanotubes. Biochar produced from co-pyrolysis showed a high HHV at 28.33 MJ/kg, indicating the high potential as a solid fuel. In addition, the thermal decomposition behaviors and kinetics of biomass and plastic waste over the as-synthesized catalysts were also investigated by thermogravimetric analysis.

Original languageEnglish (US)
Article number107127
JournalFuel Processing Technology
Volume227
DOIs
StatePublished - Mar 2022

Bibliographical note

Funding Information:
This work was supported by Start-up Funding for High-end Talents of China Agricultural University and Chinese Universities Scientific Fund ( 10092001 ).

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • Aromatic hydrocarbons
  • Carbon nanotubes
  • Catalytic fast co-pyrolysis
  • Metal-doping carbon catalysts
  • One-step catalyst synthesis
  • Syngas

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