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.
Bibliographical noteFunding Information:
This work was supported by Start-up Funding for High-end Talents of China Agricultural University and Chinese Universities Scientific Fund ( 10092001 ).
© 2021 Elsevier B.V.
- Aromatic hydrocarbons
- Carbon nanotubes
- Catalytic fast co-pyrolysis
- Metal-doping carbon catalysts
- One-step catalyst synthesis