Microwave-assisted catalytic fast pyrolysis coupled with microwave-absorbent of soapstock for bio-oil in a downdraft reactor

  • Yunpu Wang
  • , Qiuhao Wu
  • , Sha Yang
  • , Qi Yang
  • , Junlin Wu
  • , Zhiyun Ma
  • , Lin Jiang
  • , Zhenting Yu
  • , Leilei Dai
  • , Yuhuan Liu
  • , Roger Ruan
  • , Guiming Fu
  • , Bo Zhang
  • , Haibin Zhu

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

Microwave-assisted pyrolysis of biomass with HZSM-5 coupled with SiC as microwave-absorbent in a downdraft reactor is a promising method for obtaining hydrocarbon-rich bio-oil. The hydrocarbon content limits the economic and commercial viability of the bio-oil produced by pyrolysis. In this study, the effects of catalytic temperature, feedstock-to-catalyst ratio, and WHSV on the yield and composition of bio-oil are studied. In addition, this study compared the influence of downdraft reaction and updraft reaction on the yield and composition of bio-oil. Furthermore, the stability of the catalyst is studied. Catalytic temperature and feedstock-to-catalyst ratio played pivotal roles in the yield and composition of bio-oil. WHSV has minimal influence on the bio-oil yield and composition within the scope of our research. Furthermore, the optimal catalytic temperature, feedstock-to-catalyst ratio and WHSV were 400 °C, 2:1, and 72 h−1, respectively. The results illustrated that the downdraft coupled with the microwave-absorbent was conducive to the formation of aromatic hydrocarbons. The HZSM-5 performed well in five replicate experimental cycles under optimal conditions in terms of bio-oil yield and aromatic hydrocarbon yield.

Original languageEnglish (US)
Pages (from-to)11-20
Number of pages10
JournalEnergy Conversion and Management
Volume185
DOIs
StatePublished - Apr 1 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

  • Downdraft reactor
  • HZSM-5 catalyst
  • Microwave-absorbent bed
  • Microwave-assisted pyrolysis
  • Soapstock

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