Ex-situ catalytic co-pyrolysis of lignin and polypropylene to upgrade bio-oil quality by microwave heating

Dengle Duan, Yunpu Wang, Leilei Dai, Roger Ruan, Yunfeng Zhao, Liangliang Fan, Maimaitiaili Tayier, Yuhuan Liu

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59 Scopus citations


Microwave-assisted fast co-pyrolysis of lignin and polypropylene for bio-oil production was conducted using the ex-situ catalysis technology. Effects of catalytic temperature, feedstock/catalyst ratio, and lignin/polypropylene ratio on product distribution and chemical components of bio-oil were investigated. The catalytic temperature of 250 °C was the most conducive to bio-oil production in terms of the yield. The bio-oil yield decreased with the addition of catalyst during ex-situ catalytic co-pyrolysis. When the feedstock/catalyst ratio was 2:1, the minimum char and coke values were 21.22% and 1.54%, respectively. The proportion of cycloalkanes decreased and the aromatics increased with the increasing catalyst loading. A positive synergistic effect was observed between lignin and polypropylene. The char yield dramatically deceased and the bio-oil yield improved during co-pyrolysis compared with those during lignin pyrolysis alone. The proportion of oxygenates dramatically and the minimum value of 6.74% was obtained when the lignin/polypropylene ratio was 1:1.

Original languageEnglish (US)
Pages (from-to)207-213
Number of pages7
JournalBioresource Technology
StatePublished - 2017

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support from the National Natural Science Foundation of China (21466022 and 21266022), International Science & Technology Cooperation Program of China (2015DFA60170-4), Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development (Y707sb1001), Science and Technology Research Project of Jiangxi Province Education Department (GJJ150213), Innovation and Entrepreneurship Development Fund of ?Thousand talents program? Talent (1001-02102082).

Publisher Copyright:
© 2017

Copyright 2017 Elsevier B.V., All rights reserved.


  • Bio-oil
  • Co-pyrolysis
  • Ex-situ catalysis
  • HZSM-5
  • Microwave


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