Fast microwave-assisted catalytic co-pyrolysis of microalgae and scum for bio-oil production

Qinglong Xie, Min Addy, Shiyu Liu, Bo Zhang, Yanling Cheng, Yiqin Wan, Yun Li, Yuhuan Liu, Xiangyang Lin, Paul Chen, Roger Ruan

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

In this study, fast microwave-assisted catalytic co-pyrolysis of microalgae and scum on HZSM-5 catalyst for bio-oil production was investigated. The effects of co-pyrolysis temperature, catalyst to feed ratio, and microalgae to scum ratio on bio-oil yield and composition were examined. Experimental results show that temperature had great influence on the co-pyrolysis process. The optimal temperature was 550 °C since the maximum bio-oil yield and highest proportion of aromatic hydrocarbons in the bio-oil were obtained at this temperature. The bio-oil yield decreased when catalyst was used, but the production of aromatic hydrocarbons was significantly promoted when the catalyst to feed ratio increased from 1:1 to 2:1. Co-feeding of scum could improve the bio-oil and aromatics production, while the optimal microalgae to scum ratio was 1:2 from the perspective of bio-oil quality. The synergistic effect between microalgae and scum during the co-pyrolysis process became significant only when the effective hydrogen index (EHI) of feedstock was larger than about 0.7.

Original languageEnglish (US)
Pages (from-to)577-582
Number of pages6
JournalFuel
Volume160
DOIs
StatePublished - Nov 15 2015

Bibliographical note

Publisher Copyright:
© 2015, Elsevier Ltd. All rights reserved.

Keywords

  • Bio-oil
  • Catalytic co-pyrolysis
  • Microalgae
  • Microwave
  • Scum

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