Co-torrefaction of corncob and waste cooking oil coupled with fast co-pyrolysis for bio-oil production

Qiuhao Wu, Letian Zhang, Linyao Ke, Qi Zhang, Xian Cui, Liangliang Fan, Anqi Dai, Chuangxin Xu, Qihang Zhang, Krik Bob, Rongge Zou, Yuhuan Liu, Roger Ruan, Yunpu Wang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Lignocellulosic biomass is a rich source of fixed renewable carbon and a promising alternative to fossil sources. However, low effective hydrogen to carbon ratio limits its applications. This work studied the influence of oil-bath co-torrefaction of corncob and waste cooking oil for co-pyrolysis. It was compared with dry torrefaction and hydrothermal wet torrefaction firstly. Residual of oil-bath co-torrefaction were the highest of 97.01 %. Oil-bath co-torrefaction could maximize hydrogen atoms retention in corncob, which has a positive significance for deoxygenation during pyrolysis. Oil-bath co-torrefaction could also reduce the average activation energy required for corncob decomposition, while it was increased with dry torrefaction. Oil-bath co-torrefaction coupled with co-pyrolysis was more suitable for hydrocarbon-rich bio-oil production. Oil-bath co-torrefaction temperature had the greatest influence on bio-oil composition. High pressure promoted formation of the C[dbnd]C double bond and degradation of lignin, which further promoted the formation of monocyclic aromatics in bio-oil.

Original languageEnglish (US)
Article number128529
JournalBioresource Technology
StatePublished - Feb 2023

Bibliographical note

Funding Information:
This project was financially supported by the National Natural Science Foundation of China (No. 52166015; No. 22166026), The Natural Science Foundation of Jiangxi Province (20212ACB215007), The Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province (20204BCJ23011).

Publisher Copyright:
© 2022 Elsevier Ltd


  • Bio-oil
  • Co-pyrolysis
  • Co-torrefaction
  • Corncob
  • Waste cooking oil

PubMed: MeSH publication types

  • Journal Article


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